Turner Motorsport Power Pulley Kit - E46 M3

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T#:340398

Part#: PPK-S54

Ships on Jan 11, 2027

Sale - Save 30% $ 412.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 289.09 USD

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Sale - Save 30%

$ 412.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 289.09 USD

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Underdrive Power Pulleys work to 'free up' horsepower. Any accessory that spins from the main drive belt is using up power. That's power that could otherwise be used to move the car. By giving some of that power back to the engine, you can make the car faster! It's like FREE HORSEPOWER !

Underdrive pulleys for your BMW will slow down engine-mounted accessories - the water pump, power steering pump, and alternator*. These systems contribute to 'parasitic losses' - power lost from what the engine could produce if it did not have these systems. Since less energy is used to move them, that power is transferred back to the engine and used to propel the car. Our pulleys give a 10-20% reduction in rotation, releasing 10hp on the E46 M3. There's also a small but noticeable improvement in throttle response too! We have done extensive testing and development work, both on and off the track, to ensure that the accessory systems function as they should. On our Racing pulley kits we actually underdrive certain components more so we feel our Street pulleys are an ideal compromise between power/torque gains, reliability, and system performance. Our pulley kits have been on the market for over ten years, and used in all of our own cars, with zero component failures related to their use.

Our pulleys are made from T-6061 aluminum and finished in a durable black hard anodize that is very resistant to wear, chemical exposure, and heat. We designed our pulleys to look similar to the factory parts but also to be stronger and, in most cases, slightly lighter too. For example, a Turner alternator pulley is less than half the weight of the stock steel pulley! With our hardcoat aluminum you will never have to worry about a serious failure of a stock plastic pulley. A 'stealth' approach to aesthetics was our goal and we let the results speak for the pulley design. Installation is straight forward and easy with simple hand tools. Removal of the fan is required for access to the front of the engine. Total install time for a 3-piece pulley set should be around 1.5 hours. A new longer belt is included and we also recommend replacing the separate A/C belt, belt tensioners, and the guide and deflection pulleys at the same time.

* Alternator Pulley Options
Stereo Systems. We offer our kits in two different ways: the full Power Pulley Kit with all 3 pulleys or a 2 pulley kit if you do not wish to underdrive your alternator (for large stereo systems or other battery-draining modifications). Our kits have been tested for compatability with the factory premium stereo systems (Harmon Kardon, etc). But any major alterations or upgrades from the factory system will work best with our 2 pulley kit and no underdriving of the alternator. For all stock stereo systems the 3 pulley set is recommended because the Turner alternator pulley will help make more power and is also much lighter than the stock pulley.

Additional Info
ClickHere for example Dyno Chart

Click here for installation instructions.

This underdrive pulley kit fits the following BMW:
2001-2006 E46 M3 coupe & convertible
2001-2002 MZ3 Z3 M Roadster / Z3 M Coupe (S54 engine)

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Turner Motorsport Power Pulley Kit - E46 325i, E46 330i

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:340397

Part#: PPK-E46-M54

In Stock

Sale - Save 20% $ 377.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 302.39 USD

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Sale - Save 20%

$ 377.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 302.39 USD

Add to Wish List

Underdrive Power Pulleys work to 'free up' horsepower. Any accessory that spins from the main drive belt is using up power. That's power that could otherwise be used to move the car. By giving some of that power back to the engine, you can make the car faster! It's like FREE HORSEPOWER !

Underdrive pulleys for your BMW will slow down engine-mounted accessories - the water pump, power steering pump, and alternator*. These systems contribute to 'parasitic losses' - power lost from what the engine could produce if it did not have these systems. Since less energy is used to move them, that power is transferred back to the engine and used to propel the car. Our pulleys give a 5-10% reduction in rotation, releasing up to 11hp on most BMW six-cylinder engines. There's also a small but noticeable improvement in throttle response too! We have done extensive testing and development work, both on and off the track, to ensure that the accessory systems function as they should. On our Racing pulley kits we actually underdrive certain components more so we feel our Street pulleys are an ideal compromise between power/torque gains, reliability, and system performance. Our pulley kits have been on the market for over ten years, and used in all of our own cars, with zero component failures related to their use.

Our pulleys are made from T-6061 aluminum and finished in a durable black hard anodize that is very resistant to wear, chemical exposure, and heat. We designed our pulleys to look similar to the factory parts but also to be stronger and, in most cases, slightly lighter too. For example, a Turner alternator pulley is less than half the weight of the stock steel pulley! With our hardcoat aluminum you will never have to worry about a serious failure of a stock plastic pulley. A 'stealth' approach to aesthetics was our goal and we let the results speak for the pulley design. Installation is straight forward and easy with simple hand tools. Removal of the fan is required for access to the front of the engine. Total install time for a 3-piece pulley set should be around 1.5 hours. A new longer belt is included and we also recommend replacing the separate A/C belt, belt tensioners, and the guide and deflection pulleys at the same time.

* Alternator Pulley Options
Bosch or Valeo? BMW built your car with either a Bosch or Valeo brand alternator. Unfortunately, the pulley is not the same for both brands. The brand is usually printed on the black plastic cover of the alternator but may be facing the frame rail or the ground. If you know which brand you have, select your option below and we'll send you the correct alternator pulley for your BMW. Don't know which you have? NO PROBLEM! We can send you both. The 2nd pulley costs $40 but you will receive a refund once we get the un-used pulley back (return shipping not included).

Stereo Systems. We offer our kits in two different ways: the full Power Pulley Kit with all 3 pulleys or a 2 pulley kit if you do not wish to underdrive your alternator (for large stereo systems or other battery-draining modifications). Our kits have been tested for compatability with the factory premium stereo systems (Harmon Kardon, etc). But any major alterations or upgrades from the factory system will work best with our 2 pulley kit and no underdriving of the alternator. For all stock stereo systems the 3 pulley set is recommended because the Turner alternator pulley will help make more power and is also much lighter than the stock pulley.

Additional Info
Clickhere for example dyno graph

Click here for installation instructions.

This underdrive pulley kit fits the following BMW:
2001-2006 E46 BMW 325i 325ci 325xi 330i 330ci 330xi

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Turner Motorsport S54 Power Pulley Kit

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T#:590358

Part#: PPK-S54

Ships on Jan 11, 2027

Sale - Save 30% $ 418.99

This product was last offered at the strikethrough price on
11-07-2026

$ 293.29 USD

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$ 418.99

This product was last offered at the strikethrough price on
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$ 293.29 USD

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Upgrade your BMW's performance with Turner Power Pulleys, designed to enhance engine efficiency and increase available horsepower. These pulleys reduce the rotation of essential accessories by up to 10-20%, redirecting engine power to the wheels. Turner ensures these pulleys maintain proper functionality through rigorous on and off-track testing.

Crafted from durable T-6061 aluminum and finished in black hard anodizing, Turner Power Pulleys offer longevity, heat resistance, and chemical durability. They retain the stock-like appearance while providing increased strength and reduced weight, eliminating concerns about plastic failure.

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Turner Motorsport Power Pulley Kit - E46 323i/328i

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T#:340395

Part#: PPK-E46

In Stock

Sale - Save 22% $ 373.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 292.81 USD

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Sale - Save 22%

$ 373.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 292.81 USD

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Underdrive Power Pulleys work to 'free up' horsepower. Any accessory that spins from the main drive belt is using up power. That's power that could otherwise be used to move the car. By giving some of that power back to the engine, you can make the car faster! It's like FREE HORSEPOWER !

Underdrive pulleys for your BMW will slow down engine-mounted accessories - the water pump, power steering pump, and alternator*. These systems contribute to 'parasitic losses' - power lost from what the engine could produce if it did not have these systems. Since less energy is used to move them, that power is transferred back to the engine and used to propel the car. Our pulleys give a 10-20% reduction in rotation, releasing up to 11hp on most BMW six-cylinder engines. There's also a small but noticeable improvement in throttle response too! We have done extensive testing and development work, both on and off the track, to ensure that the accessory systems function as they should. On our Racing pulley kits we actually underdrive certain components more so we feel our Street pulleys are an ideal compromise between power/torque gains, reliability, and system performance. Our pulley kits have been on the market for over ten years, and used in all of our own cars, with zero component failures related to their use.

Our pulleys are made from T-6061 aluminum and finished in a durable black hard anodize that is very resistant to wear, chemical exposure, and heat. We designed our pulleys to look similar to the factory parts but also to be stronger and, in most cases, slightly lighter too. For example, a Turner alternator pulley is less than half the weight of the stock steel pulley! With our hardcoat aluminum you will never have to worry about a serious failure of a stock plastic pulley. A 'stealth' approach to aesthetics was our goal and we let the results speak for the pulley design. Installation is straight forward and easy with simple hand tools. Removal of the fan is required for access to the front of the engine. Total install time for a 3-piece pulley set should be around 1.5 hours. A new longer belt is included and we also recommend replacing the separate A/C belt, belt tensioners, and the guide and deflection pulleys at the same time.

* Alternator Pulley Options
Bosch or Valeo? BMW built your car with either a Bosch or Valeo brand alternator. Unfortunately, the pulley is not the same for both brands. The brand is usually printed on the black plastic cover of the alternator but may be facing the frame rail or the ground. If you know which brand you have, select your option below and we'll send you the correct alternator pulley for your BMW. Don't know which you have? NO PROBLEM! We can send you both. The 2nd pulley costs $40 but you will receive a refund once we get the un-used pulley back (return shipping not included).

Stereo Systems. We offer our kits in two different ways: the full Power Pulley Kit with all 3 pulleys or a 2 pulley kit if you do not wish to underdrive your alternator (for large stereo systems or other battery-draining modifications). Our kits have been tested for compatability with the factory premium stereo systems (Harmon Kardon, etc). But any major alterations or upgrades from the factory system will work best with our 2 pulley kit and no underdriving of the alternator. For all stock stereo systems the 3 pulley set is recommended because the Turner alternator pulley will help make more power and is also much lighter than the stock pulley.

Additional Info
Clickhere for example dyno graph

Click here for installation instructions.

This underdrive pulley kit fits the following BMW:
1999-2000 E46 BMW 323i 323ci 328i 328ci

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BWM E46 M3 Turner Motorsport Power Pulley Kit

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T#:343815

Part#: PPK-S54-A-TKT

Ships on Jan 11, 2027

Sale - Save 30% $ 354.99

This product was last offered at the strikethrough price on
11-07-2026

$ 248.49 USD

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BWM E46 M3 Turner Motorsport Power Pulley Kit

Enhance the performance of your BMW E46 M3 with the Turner Motorsport Power Pulley Kit. This high-quality kit offers several benefits to improve the power and responsiveness of your vehicle. Here are the key advantages:

Increases engine power output for enhanced performance
Improves throttle response and acceleration
Reduces rotational mass for improved engine efficiency
Easy to install with included instructions

Upgrade your BMW E46 M3 with the Turner Motorsport Power Pulley Kit for an exhilarating driving experience.

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BMW E46 Z3 M54 Turner Motorsport Power Pulley Kit - 325i/330i ...

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T#:187020

Part#: PPK-E46-M54

In Stock

Sale - Save 20% $ 377.99

This product was last offered at the strikethrough price on
11-07-2026

$ 302.39 USD

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NOW LOCATED UNDER T#340397

BMW E46 Z3 M54 Turner Motorsport Power Pulley Kit - 325i/330i: Boost Your BMW's Performance

Increases horsepower and torque
Improves throttle response
Lightweight aluminum construction
Easy to install with basic tools

Upgrade your BMW's performance with the BMW E46 Z3 M54 Turner Motorsport Power Pulley Kit - 325i/330i. This kit increases horsepower and torque, resulting in improved acceleration and overall driving experience. The lightweight aluminum construction reduces rotational mass, enhancing throttle response and engine performance. Installation is easy with basic tools, making it a convenient upgrade for BMW enthusiasts.

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Turner Motorsport Race Alternator Pulley For E46 M3

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T#:388710

Part#: TEN4622RM3

In Stock

Sale - Save 15% $ 220.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 187.84 USD

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Sale - Save 15%

$ 220.99

This product was last offered at the strikethrough price on
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Starting at $ 187.84 USD

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For use with the stock VALEO M3 alternator only Part of the process of building a proper race car is to delete and simplify portions of the wiring harness. This not only saves weight and reduces complexity, but it also allows you to run a smaller, lighter racing battery. So why is your alternator still charging at the original rate?!? This S54 racing alternator pulley underdrives the alternator more than our standard Power Pulley, freeing up horsepower and reducing alternator wear. This pulley is over 70% larger than the original stock pulley. With less electrical load, you don't need the original alternator output anymore. You can drive the alternator less and return that "lost" horsepower back to the engine. This part was developed and race-proven on our E46 Touring Cars. Because this pulley is so much larger than the original (70%), special care will need to be taken so that it does not interfere wtih other components on the engine - power steering lines, oil cooler lines, coolant hoses, etc. This pulley is strictly for race/track cars only, due to the size of the alternator pulley the proper voltage cannot be maintained at low RPM. This pulley must be used with our Turner Power Pulley or Turner Racing Pulley kits.

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BMW E46 Z3 Turner Motorsport Power Pulley Kit 325i/330i Valeo Alterna...

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T#:301180

Part#: TMS301180

In Stock

Sale - Save 25% $ 372.99

This product was last offered at the strikethrough price on
11-07-2026

$ 279.74 USD

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Enhance your BMW's performance with the BMW E46 Z3 Turner Motorsport Power Pulley Kit 325i/330i Valeo Alternator. This high-quality power pulley kit is designed to increase horsepower and torque by reducing parasitic drag on the engine. With easy installation and precise fitment, this kit is a must-have upgrade for any BMW E46 or Z3 owner.

Increases horsepower and torque
Reduces parasitic drag on the engine
Easy installation process
Precise fitment ensures optimal performance

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BMW E46 M3 Race Alternator Pulley Turner Motorsport

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T#:389737

Part#: TEN4622RM3KT

Ships on Jan 11, 2027

Sale - Save 5% $ 211.99

This product was last offered at the strikethrough price on
11-07-2026

$ 201.39 USD

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$ 201.39 USD

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BMW E46 M3 Race Alternator Pulley Turner Motorsport

Enhance the performance of your BMW E46 M3 with the BMW E46 M3 Race Alternator Pulley from Turner Motorsport. Engineered for racing enthusiasts, this alternator pulley reduces rotational mass for improved engine response and horsepower gains. Crafted from high-quality materials, it ensures durability and reliability on the track. Upgrade your BMW E46 M3's performance with this premium race alternator pulley.

Reduces rotational mass for improved engine response
Increases horsepower gains
High-quality materials ensure durability and reliability
Designed for racing enthusiasts

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BMW E46 Turner Motorsport Power Pulley Kit

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T#:395842

Part#: PPK-E46TU-VALEO

In Stock

Sale - Save 25% $ 382.99

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11-07-2026

$ 287.24 USD

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BMW E46 Turner Motorsport Power Pulley Kit

Improve the performance of your BMW E46 with the BMW E46 Turner Motorsport Power Pulley Kit. This high-quality pulley kit is designed to increase horsepower and torque by reducing parasitic drag on the engine. Here are the key benefits:

Increases horsepower and torque for improved acceleration
Reduces parasitic drag on the engine for enhanced efficiency
Precision-engineered for a perfect fit and easy installation
Durable construction ensures long-lasting performance

Enhance the performance and driving experience of your BMW E46 with the BMW E46 Turner Motorsport Power Pulley Kit.

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E36/E46/Z3/Z4 ECS Tuning Aluminum Water Pump Pulley - Black

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T#:363707

Part#: 001977ECS03A

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Sale - Save 10% $ 104.99

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11-07-2026

$ 94.49 USD

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Most of the pulleys on your BMW engine are plastic, which become brittle and frail over time and from engine bay heat. A failed pulley could leave you stranded which is why it is vital to inspect the pulleys during routine maintenance. This is an aluminum version of the stock water pump pulley used on the M50/M52/M52TU/M54 engine in the E36, E46, Z3, Z4, and other models. It uses the same hardware and the original belt as the stock plastic pulley. But the aluminum will last much longer.

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ECS Tuning Performance Kevlar Reinforced Accessory Belt - Water Pump ...

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T#:20979672

Part#: 6PK1460

Ships in 8 Business Days

Sale - Save 15% $ 33.99

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11-11-2026

$ 28.89 USD

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Replaces BMW # 11287837898 ECS Tuning Performance Kevlar reinforced belts give you that extra piece of mind! Kevlar reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM style belts. ECS Tuning Performance Kevlar reinforced belts have been put through a series of multiple tests such. Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432.

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E46 M3, Z4M ECS Tuning Aluminum Water Pump Pulley

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T#:367060

Part#: 002778ECS01

Ships on Dec 18, 2026

Sale - Save 15% $ 100.99

This product was last offered at the strikethrough price on
11-07-2026

$ 85.84 USD

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Most of the pulleys on your BMW engine are plastic, which become brittle and frail over time and from engine bay heat. A failed pulley could leave you stranded which is why it is vital to inspect the pulleys during routine maintenance. This is an aluminum version of the stock water pump pulley used on the S54 engine in the E46 M3, MZ3, and Z4M. It's the same size and uses the same hardware and the original belt as the stock plastic pulley. But the aluminum will last much longer.

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Hydraulic Alternator Belt Tensioner Assembly

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T#:396757

Part#: 11287838797

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$ 53.99 USD

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$ 53.99 USD

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VAC Motorsports ATI A/C Pulley - BMW M50 M52 M52TU M54 S50 S52 ...

T#:8076765

Part#: VAC-HPCD-M50-ACP

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$ 149.99 USD

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If you are planning on keeping your Air Conditioning system in your street or track car, then you will need to combine VAC's ATI AC Pulley with the ATI Harmonic Damper.

URO Aluminum Water Pump Pulley - E39, E46, E53, E60, E83, Z3, Z4 ...

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T#:340641

Part#: 11511436590

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$ 45.99 USD

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An upgrade over commonly failing plastic pulley

VAC Harmonic SuperDamper By ATI - M52/S52/M52TU/M54

T#:27905092

Part#: VAC-HPCD-M50

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$ 799.99 USD

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$ 799.99 USD

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If you're grappling with issues like crankshaft failures and oil pump breakdowns in your BMW 6-cylinder engines, you're not alone. Even seasoned mechanics can overlook the critical aspect of harmonic resonance control in these inline-6 motors, despite their optimal configuration.

Enter ATI Performance Products in collaboration with VAC Motorsports, presenting a solution in the form of new dampers tailored for BMW 2.5L, 2.8L, 3.0L, and 3.2L straight-6 engines found in various models like the E36 and E46 M3, E9X, and E6X, as well as newer Z3s and Z4s. These dampers effectively nullify crankshaft harmonic vibrations, paving the way for enhanced horsepower and torque output, alongside a reduction in internal engine wear. Say goodbye to issues like fractured oil pumps and timing chain mishaps! By pairing these dampers with a VAC accessory pulley, you seamlessly replace the OEM balancer. Featuring a 7” outer diameter and OEM-style timing alignment tabs, these ATI Super Dampers boast SFI 18.1 Safety Certification, ensuring they're competition-ready.

What sets the ATI SuperDamper apart? It's the remedy for vibration woes in inline 6 engines, especially those equipped with lightweight clutch and flywheel setups. Expect diminished wear on bearings, engine accessories, and oil pumps, all while being compatible with underdrive pulleys.

Included in the kit are the damper itself, a lightweight VAC Billet Crankshaft Pulley, along with all necessary mounting and installation hardware. Note that it's not compatible with S50B30 & S50B32 Euro Engines. For street/track vehicles with air conditioning, opting for the Additional A/C Pulley Option is imperative, given that the OE A/C pulley isn't compatible. Rest assured, all required mounting and installation hardware is included, and the entire package is proudly Made in the USA.

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Water Pump Pulley

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T#:638798

Part#: 11517840403

Ships in 1 Business Day

$ 57.99 USD

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ECS Performance Kevlar Reinforced Accessory Belt - E46 E39 E53 E63 E8...

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T#:639025

Part#: 6PK1538

In Stock

Sale - Save 30% $ 35.99

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11-11-2026

$ 25.19 USD

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ECS Tuning Performance Kevlar-reinforced belts give you that extra peace of mind! Kevlar reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM style belts. ECS Tuning Performance Kevlar-reinforced belts have been put through a series of multiple tests: Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432.

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Accessory Belt Service Kit - E39 E46 M54 (2002+)

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T#:401685

Part#: 11287512762KT3

Ships on Jan 11, 2027

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This product was last offered at the strikethrough price on
06-23-2026

$ 172.00 USD

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This kit covers many of the common wear items that should be changed any time the serpentine belt is being replaced. As these cars gain years and mileage the belt tensioners will also need to be replaced along with the actual belts. It won't do any good to replace the belt if the tensioners are worn. This kit will save you time and money over buying these pieces individually. This kit includes an updated hydraulic alternator tensioner for added reliability and longevity.

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Rein M52 M54 Water Pump Pulley - 11511436590 - E46, E39, E60, E83, E5...

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T#:591711

Part#: 11511436590

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$ 50.99

This product was last offered at the strikethrough price on
10-22-2026

$ 46.99 USD

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A common failing piece due to the plastic design.

S54 Turner Motorsport Ultimate Power Pulley And Drive Belt Overhaul S...

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T#:15710772

Part#: 11281730349-KT

Ships on Jan 11, 2027

Sale - Save 10% $ 509.99

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11-07-2026

$ 458.99 USD

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$ 458.99 USD

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The idea of power pulleys is simple. The less effort the engine puts into running accessories such as the water pump, power steering, pump alternator etc., the more of that power can be used elsewhere - your wheels! The way this is done by reducing the rotation of the pulleys by as much as 10-20%! The end result is more horsepower at your disposal. Turner has done extensive testing (on and off the track), to ensure that the accessory systems still function as intended and without failure. These pulleys offer an excellent compromise of power gains, reliability and performance. All Turner pulleys are constructed of high quality T-6061 aluminum for durability and longevity. They are also finished in a black hard anodizing, which is highly resistant to wear including chemical and heat exposure. They have been designed to carry stock-like aesthetics, but with increased strength properties and lighter weight. Because of the durable aluminum construction, you can also put the worries of a serious plastic failure to rest. These pulleys will last, all the while increasing horsepower too! While you're installing your Power Pulley Kit, it makes sense to overhaul your Accessory Belt System as well, so this kit includes our Accessory Belt Kit as well.

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Mechanical Alternator Belt Tensioner Assembly

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T#:371980

Part#: 11281427252

Ships in 1 Business Day

$ 50.99 USD

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Tensions the belt connecting the water pump, alternator, and power steering pump. Includes roller.

VAC Motorsports Lightweight Underdrive Power Pulley Set - S54 ...

T#:27705420

Part#: VACUPPSS542ULG

Ships on Nov 30, 2026

$ 294.99 USD

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Crafted from high-grade domestic USA 6061-T6 Billet Aluminum, these pulleys are a testament to precision engineering. Rigorously tested through extensive hours of racing and street use, they've proven their reliability and performance excellence.

Each pulley is meticulously zero-balanced and thoroughly inspected to ensure zero-runout, guaranteeing optimal performance without compromising on reliability, noise, or vibration.

This comprehensive kit comprises a precision power steering pulley, water pump pulley, and an OE Contitech Brand drive belt. Experience a notable boost of 8hp and 7 ft/lbs. of torque to the wheels, making it ideal for stock vehicles, track cars, and even those with upgraded audio systems seeking consistent voltage output from their alternators.

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Hydraulic Alternator Belt Tensioner Conversion Kit

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T#:15710833

Part#: 11287838797-KT

Ships in 1-2 days

Sale - Save 32% $ 163.99

This product was last offered at the strikethrough price on
10-12-2026

$ 111.09 USD

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$ 111.09 USD

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The original mechanical design is has been discontinued by BMW. So now Turner offers this complete hydraulic tensioner conversion kit for your BMW alternator/water pump/power steering belt. Changes the old style mechanical design to the updated hydraulic design recommended by BMW. Includes the following parts Hydraulic Tensioner Adjusting Pulley Caps & Dust Guards Securing Hardware

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Mechanical A/C Belt Tensioner Assembly

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T#:384308

Part#: 11287512758

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$ 43.99 USD

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Complete tensioner assembly with roller

OEM Accessory Belt Service Kit - E39, E46 M54 (up to 2002)

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T#:401686

Part#: 11281748131KT2

Ships on Jan 11, 2027

Sale - Save 31% $ 272.99

This product was last offered at the strikethrough price on
06-23-2026

$ 188.63 USD

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This product was last offered at the strikethrough price on
06-23-2026

$ 188.63 USD

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This kit covers many of the common wear items that should be changed any time the serpentine belt is being replaced. As these cars gain years and mileage the belt tensioners will also need to be replaced along with the actual belts. It won't do any good to replace the belt if the tensioners are worn. This kit will save you time and money over buying these pieces individually. This kit includes an updated hydraulic alternator tensioner for added reliability and longevity.

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OEM Accessory Belt Service Kit - E46 E39 E53 M54 (Pre-09/2002) ...

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T#:554446

Part#: M54ACCKT2

Ships on Jan 11, 2027

Sale - Save 32% $ 256.99

This product was last offered at the strikethrough price on
06-23-2026

$ 175.38 USD

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This product was last offered at the strikethrough price on
06-23-2026

$ 175.38 USD

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Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or over heated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.

Fits the following BMWs:
2000-09/2002 E53 BMW X5 M54
2000-09/2002 E39 BMW M54
1999-09/2002 E46 BMW M54

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Belt Tensioner Conversion Kit

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T#:600039

Part#: 11287838797K

Back Ordered

$ 82.99 USD

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Update from a mechanical tensioner to a hydraulic style tensioner

Rein M52 M54 Power Steering Pump Pulley - PKP0124 - E36, E46, E39, E5...

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T#:53750207

Part#: PKP0124

In Stock

$ 41.99 USD

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$ 41.99 USD

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Upgrade the Plastic Pulley in Your BMW with an All Aluminum Construction Replacement from Rein

Mechanical A/C Belt Tensioner Assembly

For vehicles with production date up to 09/2002

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T#:361998

Part#: 11281433571

Ships in 1 Business Day

$ 53.99 USD

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Complete tensioner assembly with roller

Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E46 M3, Z3M, Z...

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T#:23482931

Part#: S54KEVACCKT

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Sale - Save 26% $ 330.99

This product was last offered at the strikethrough price on
06-16-2026

$ 245.54 USD

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Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belts, tensioner assemblies, and new tensioner pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!

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OEM Accessory Belt Kit - E46 M3

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T#:554437

Part#: E46M3ACCKT

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This product was last offered at the strikethrough price on
08-24-2026

$ 262.04 USD

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This product was last offered at the strikethrough price on
08-24-2026

$ 262.04 USD

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Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or over heated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.

Fits the following BMWs:
2001-2006 E46 BMW M3

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VAC Motorsports S54 Underdrive Power Pulley Set - 3 Pulley Race Set -...

T#:29533361

Part#: VACUPPSS543ULG

Ships on Nov 30, 2026

$ 349.99 USD

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These pulleys are precision made from domestic USA 6061-T6 Billet Aluminum. They have undergone thousands of hours in testing, race use, and street miles accumulated to show these pulleys work great and give you the edge. Each is precision zero-balanced and inspected for zero-runout for the best performance and to have no adverse effects on reliability, noise, or vibration. This 3 Pulley Race Set is a very popular choice: just like the 2 pulley set, a precision power steering pulley and water pump pulley are included, but VAC includes an additional underdriven alternator pulley for maximum power output on the track. We have seen 11hp and 9 ftlbs to the wheels on otherwise stock racing cars with this kit.

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E46 E39 M54 ...

For vehicles with production date from 09/2002

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T#:23482922

Part#: 4PK863ATKT

In Stock

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This product was last offered at the strikethrough price on
06-10-2026

$ 177.54 USD

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This product was last offered at the strikethrough price on
06-10-2026

$ 177.54 USD

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Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belts, tensioner assemblies, and new tensioner pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!

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OEM Accessory Belt Service Kit - E46 E39 E53 M54 (09/2002+)

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T#:554445

Part#: M54ACCKT

Ships on Jan 11, 2027

Sale - Save 24% $ 249.99

This product was last offered at the strikethrough price on
06-23-2026

$ 191.17 USD

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This product was last offered at the strikethrough price on
06-23-2026

$ 191.17 USD

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Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or over heated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.

Fits the following BMWs:
09/2002-2006 E53 BMW X5 M54
09/2002-2003 E39 BMW M54
09/2002-2005 E46 BMW M54

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E46 M3 Power Package - Shark Injector, Power Pulleys, & IAT Relocatio...

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T#:393209

Part#: E46S54SIPULLEY

Ships on Jan 11, 2027

Sale - Save 23% $ 1,042.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 801.78 USD

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Sale - Save 23%

$ 1,042.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 801.78 USD

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Shark Injector Performance Software
The enthusiast's choice for over a decade, the Shark Injector's performance is only equaled by its own ease of install! Tune your ECU at the press of a button simply by plugging into the under-dash OBDII diagnostic port, there is no removal of your car's computer; no laptop or cables required. What does the Shark offer?

Excellent horsepower and torque gains - peak: 18whp/11wtq, max: 22whp/16wtq
Faster and smoother throttle response
Top speed limiter removed
Extremely easy to install/uninstall
Reversible and reusable
Elevated 8,250 RPM rev limiter
Compatible with 91 octane; 93 recommended

Turner Motorsport Power Pulleys
Underdrive Power Pulleys work to 'free up' horsepower. Any accessory that spins from the main drive belt is using up power. That's power that could otherwise be used to move the car. By giving some of that power back to the engine, you can make the car faster! We measured 10.7 whp at 6960 rpm and 8.1 lb-ft of torque at 5550 on a 1995 M3. Race pulleys deliver even more power.

Another "no-downside" upgrade, we even include a new belt. Total install time for a 3-piece pulley set should be around 1.5 hours. We offer three options in pulleys:
1.) No alternator pulley included - for cars with big amps and powerful stereo systems that need the extra juice.
2.) Street Power Pulleys - our most popular option with no downside!
3.) Race Power Pulleys - delivering 15 "free" horsepower, this set underdrives the water pump, power steering pulley, and alternator for lower temps, less wear, and more power. Not for street use.

Intake Air Temperature Relocation Kit
Looking to maximize your power gains? Add a Turner IAT Relocation to combat power-robbing heat soak - the only true plug-and-play solution available. Heat soak is a real plague on consistent power for a stock or tuned vehicle. Click here to read more about our IAT relocation kit.

This item fits the following BMWs:
2001-2006 E46 BMW M3

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Hydraulic Alternator Belt Tensioner Roller

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T#:594521

Part#: 11281748131

Ships on Dec 4, 2026

$ 23.99 USD

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Replacement is recommend with every belt service

Rein Vibration Damper - 11237513862 - E46, E39, E60, E83, E53 ...

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T#:38161721

Part#: 11237513862

Ships in 3 Business Days

$ 92.99 USD

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$ 92.99 USD

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Accessory Belt - Air Conditioning Compressor - E46 E39 E53 E83 E85 - ...

For vehicles with production date from 09/2002

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T#:55497436

Part#: 500040863

In Stock

$ 5.99

This product was last offered at the strikethrough price on
09-14-2026

$ 4.99 USD

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$ 4.99 USD

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This belt drives the air conditioning compressor for the AC system. We recommend checking your belts every 10,000 miles. If your belts have excessive cracks, dry rot, missing teeth and/or grooves, are cause noise, it's time for new ones.

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ECS Tuning Performance Kevlar Reinforced Accessory Belt - A/C - BMW ...

For vehicles with production date up to 09/2002

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T#:21693590

Part#: 5PK863

Ships in 8 Business Days

Sale - Save 35% $ 26.99

This product was last offered at the strikethrough price on
11-11-2026

$ 17.54 USD

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Replaces BMW # 11281437450 and 11281437872 ECS Tuning Performance Kevlar reinforced belts give you that extra piece of mind! Kevlar reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM style belts. ECS Tuning Performance Kevlar reinforced belts have been put through a series of multiple tests such. Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432.

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Drive Belt Pulley Cap

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T#:639224

Part#: 11281727159

In Stock

$ 3.99 USD

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$ 3.99 USD

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Replace that missing protective cap and protect your belt tensioner bearing from debris.

ECS Tuning Performance Kevlar Reinforced Accessory Belt - A/C - E46 E...

For vehicles with production date from 09/2002

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T#:20979670

Part#: 4PK863

In Stock

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This product was last offered at the strikethrough price on
11-11-2026

$ 16.19 USD

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Replaces BMW # 11287512762, 11281437450, and 11281437872 ECS Tuning Performance Kevlar reinforced belts give you that extra piece of mind! Kevlar reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM style belts. ECS Tuning Performance Kevlar reinforced belts have been put through a series of multiple tests such. Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432.

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Meyle Idler Pulley

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T#:369422

Part#: 11287841228

In Stock

Sale - Save 62% $ 33.99

This product was last offered at the strikethrough price on
11-07-2026

$ 13.00 USD

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$ 33.99

This product was last offered at the strikethrough price on
11-07-2026

$ 13.00 USD

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Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems

Rein Vibration Damper - 11231438995 - E36, E46, E39, E53

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T#:38195378

Part#: 11231438995

Ships in 3 Business Days

$ 112.99 USD

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$ 112.99 USD

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ECS Tuning Performance Kevlar Reinforced Accessory Belt - A/C - E46 M...

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T#:23416515

Part#: 5PK830

In Stock

Sale - Save 35% $ 26.99

This product was last offered at the strikethrough price on
11-11-2026

$ 17.54 USD

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$ 26.99

This product was last offered at the strikethrough price on
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$ 17.54 USD

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Replaces BMW # 11287830946 ECS Tuning Performance Kevlar reinforced belts give you that extra piece of mind! Kevlar reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM style belts. ECS Tuning Performance Kevlar reinforced belts have been put through a series of multiple tests such. Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432.

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Performance Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E4...

For vehicles with production date up to 09/2002

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T#:22097548

Part#: 11281706545TKT

Ships in 8 Business Days

Sale - Save 20% $ 268.99

This product was last offered at the strikethrough price on
11-07-2026

$ 214.93 USD

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$ 268.99

This product was last offered at the strikethrough price on
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$ 214.93 USD

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Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes everything you need to service the belt drive system and keep everything in check, including the updated Hydraulic tensioner to keep your E46 driving like a dream. This kit also includes ECS Tuning's Kevlar reinforced belt for longer life and resistance. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!

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Gates Mechanical A/C Belt Tensioner Assembly - E39, E46, E53, Z3, Z4 ...

For vehicles with production date up to 09/2002

T#:591610

Part#: 11281433571

Ships on Dec 2, 2026

$ 84.99 USD

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$ 84.99 USD

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Complete tensioner assembly with roller

Gates Belt - A/C Compressor 4K X 863 - E46 E53 E83 Z4 E39

For vehicles with production date from 09/2002

T#:596321

Part#: 11287512762

Ships on Dec 2, 2026

$ 20.99 USD

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$ 20.99 USD

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Meyle V-Ribbed Accessory Belt - Alternator/Water Pump/Power Steering ...

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T#:55497412

Part#: 0500061540

Ships on Dec 2, 2026

$ 12.99

This product was last offered at the strikethrough price on
08-26-2026

$ 11.99 USD

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$ 11.99 USD

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This is the main drive belt / serpentine belt 6PK1540 that drives all of the engine auxiliaries, such as the alternator, water pump, and power steering pump. If your belt has excessive cracks, dry rot, missing teeth and/or grooves, or is causing noise, it's time for a new one.

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BMW Drive Belts & V-Belts for BMW 3 Series E46 (1999-2005)

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BWM E46 M3 Turner Motorsport Power Pulley Kit

BMW E46 Z3 M54 Turner Motorsport Power Pulley Kit - 325i/330i: Boost Your BMW's Performance

BMW E46 M3 Race Alternator Pulley Turner Motorsport

BMW E46 Turner Motorsport Power Pulley Kit

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