BMW Cooling System Parts & Accessories for BMW E90 M3 S65 4.0L

Bav Auto Spill-Proof Coolant / Antifreeze Funnel

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T#:580395

Part#: B8800082

Ships in 10 Business Days

Sale - Save 15% $ 33.99

This product was last offered at the strikethrough price on
08-19-2026

$ 28.99 USD

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Sale - Save 15%

$ 33.99

This product was last offered at the strikethrough price on
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$ 28.99 USD

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Multiple adapters include to fit a variety of vehicles.

Titanium Coolant Bleeder Screw Upgrade

T#:38621407

Part#: BMS-TCBS

Back Ordered

$ 25.00 USD

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$ 25.00 USD

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Replace your fragile OEM plastic coolant bleeder screw, which is prone to cracking and failure, with a premium titanium upgrade built for strength and style under the hood. Factory plastic components weaken over time due to constant heat cycles, leading to brittleness and potential failure. Our titanium replacement delivers superior durability, being twice as strong as aluminum yet 45% lighter than steel, ensuring unmatched resilience and long-term reliability for your coolant system. More than an upgrade, it’s a must-have for engine longevity. CNC-machined from solid titanium, each screw features a laser-etched Burger Motorsports logo and is hand-burned to create unique color patterns—no two are alike. A heavy-duty replacement O-ring is included for a perfect fit.

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VTT Billet Coolant Reservoir Cap - Anodized Blue - Most BMWs 2006+ (E...

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T#:7530036

Part#: COOLANTCAPBLUE

In Stock

$ 79.99 USD

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$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Do88 - BigPack BMW M3 E90/E92 DKG DCT

For BMW M3 E90 and E92 models with DKG/DCT transmission

T#:34885395

Part#: BIG-M3-DCT

In Stock

$ 3,041.99

This product was last offered at the strikethrough price on
10-03-2026

$ 2,799.99 USD

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$ 2,799.99 USD

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Do88 - BigPack BMW M3 E90/E92 DKG DCT offers a premium solution for BMW enthusiasts seeking optimal cooling performance for their high-performance M3 models. Designed specifically for the BMW M3 E90 and E92 equipped with the DKG/DCT transmission, this complete cooling package by Do88 provides significant improvements in engine and transmission temperatures, ensuring peak performance and reliability under extreme conditions. Ideal for both street and track applications, this package offers unparalleled benefits for any driver looking to enhance their BMW’s performance.

Key Features:

Comprehensive cooling solution designed for BMW M3 E90 and E92 models with DKG/DCT transmission Includes - M3 engine oil cooler, M3 DCT / DKG oil cooler, M3 power steering cooler, M3 radiator Significantly reduces heat levels, allowing for sustained performance in intense driving scenarios Direct-fit design for straightforward installation without extensive modifications Engineered to withstand high-performance demands for both street and track use The Do88 BigPack BMW M3 E90/E92 DKG DCT cooling kit is a top choice for enthusiasts and professional drivers who need reliable and robust performance. Designed with precision and superior materials, this package ensures your BMW M3 remains cool under pressure, making it an essential upgrade for any Turner Motorsport enthusiast aiming to achieve the ultimate driving experience.

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DO88- S65 Oil Cooler (Race)- E9X M3

T#:13891856

Part#: OC100

In Stock at Vendor

$ 782.99 USD

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$ 782.99 USD

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The Beloved S65 V8 from BMW is well known and claimed to be one of the best engines ever introduced by the brand, but just like any other powertrain, it comes with its own set of issues. One of these issues is cooling issues. The team at DO88 took this opportunity to create and engineer a newly upgraded oil cooler to eliminate all of the previous issues. Boasting a 65% increase in core volume, a 59% larger active cooling area, and a 13.9% higher oil volume, this cooler definitely outperforms its OE counterpart. Nonetheless, this oil cooler is the perfect upgrade to your E9X M3!

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E90/92 M3 Aluminum Radiator

T#:13891817

Part#: WC190

In Stock at Vendor

$ 712.00 USD

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$ 712.00 USD

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The team at DO88 has vigorously tested this radiator to deliver peak performance with the peace of mind of quality for your N55 engine. They guarantee reliability and endurance in all situations to let your car breathe better than before! Boasting a 14% increase in core volume and 8% lower coolant temps, this upgrade is a no-brainer for petrol heads like us. Keeping core temperatures low eliminates the risk of heat soak leading to overheating giving you max performance at any given moment. no compromise has been made at DO88 leaving you with one of the best radiator options on the market!

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VTT Billet Coolant Reservoir Cap - Anodized Red - Most BMWs 2006+ (E/...

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T#:7530034

Part#: COOLANTCAPRED

In Stock

$ 79.99 USD

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$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Bav Auto Fan Clutch Wrench - 32mm

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T#:580348

Part#: B8800019

In Stock

Sale - Save 20% $ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD

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Sale - Save 20%

$ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD

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Used to remove your fan clutch

Race German Coolant Temperature Sender Adapter - M12x1.5

T#:6827887

Part#: RGCTSAM12

In Stock

$ 35.99 USD

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$ 35.99 USD

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Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for M12x1.5 sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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Radiator / Cooling System Pressure Tester- Bavarian Autosport ...

10X Entries Into Our F80 M3 Sweepstakes

T#:580397

Part#: B8800084

In Stock

Sale - Save 15% $ 146.99

This product was last offered at the strikethrough price on
05-03-2026

$ 124.94 USD

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Sale - Save 15%

$ 146.99

This product was last offered at the strikethrough price on
05-03-2026

$ 124.94 USD

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Race German Coolant Temperature Sender Adapter - 1/8NPT

T#:6827888

Part#: RGCTSA1/8NPT

In Stock

$ 35.99

This product was last offered at the strikethrough price on
10-07-2026

$ 31.99 USD

Limited Qty Sale

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$ 35.99

This product was last offered at the strikethrough price on
10-07-2026

$ 31.99 USD

Limited Qty Sale

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Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for 1/8NPT sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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Red Line Supercool Performance Coolant - Concentrate - 1 Gallon ...

T#:640437

Part#: 81205

In Stock

$ 68.99 USD

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$ 68.99 USD

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Red Line SuperCool Concentrate fortified with WaterWetter is a concentrated antifreeze/coolant designed to maximize the performance of your cooling system with superior protection against cavitation corrosion/erosion. Using SuperCool Concentrate diluted with distilled water protects the entire cooling system keeping new components like new for 5 years/150,000 miles and prevents further damage to older components. Red Line’s proprietary coolant additive formula enhances the fluid’s ability to transfer heat, reducing operating temperatures by up to 20*F and prolonging the life of the entire cooling system. Red Line's SuperCool is an OAT coolant that is a Nitrate and Silicate Free product with its own proprietary corrosion technology to offer superior protection for aluminum engines found in all European vehicles, performance vehicles, as well as other applications. SuperCool will not void the factory warranty either. It can be used to top off the existing coolant of any BMW and will not cause any ill-effects on the cooling system because it is silicate and nitrate free. It is still better to flush it out and switch completely to SuperCool to get all the full benefits of the product in performance and protection.

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Red Line SuperCool Performance Coolant - Pre-Mixed - 1 Gallon ...

T#:640436

Part#: 81215

In Stock

$ 54.99 USD

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$ 54.99 USD

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Red Line SuperCool Performance Coolant fortified with WaterWetter is a 50/50 prediluted antifreeze/coolant designed to maximize the performance of your cooling system with superior protection against cavitation corrosion/erosion. Using 100% SuperCool Performance protects the entire cooling system, keeping new components like new for 5 years/150,000 miles and prevents further damage to older components. Red Line’s proprietary coolant additive formula enhances the fluid’s ability to transfer heat, reducing operating temperatures by up to 20*F and prolonging the life of the entire cooling system. Red Line's SuperCool is an OAT coolant that is a Nitrate and Silicate Free product with its own proprietary corrosion technology to offer superior protection for aluminum engines found in all European vehicles, performance vehicles, as well as other applications. SuperCool will not void the factory warranty either. It can be used to top off the existing coolant of any BMW and will not cause any ill-effects on the cooling system because it is silicate and nitrate free. It is still better to flush it out and switch completely to SuperCool to get all the full benefits of the product in performance and protection.

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BMW Racing Oil Cooler - E90/E92 M3 - DKG / DCT

For DCT/DKG Transmission Only

T#:23913952

Part#: OC-110

In Stock at Vendor

$ 1,299.99 USD

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$ 1,299.99 USD

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The do88 oil cooler boasts substantial advantages over the original: 217% larger core volume: 2208 cm3 vs. 696 cm3 178% greater active cooling area: 3456 cm2 vs. 1242 cm2 18% lower oil temperature past the oil cooler: 74°C vs. 90°C 110% larger oil volume: 6.5dl vs. 3.1dl Convenient drop-in fitment for the specified cars.

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BigPack BMW M3 E90/E92 - Manual

For manual transmissions only!

T#:35761627

Part#: BIG-M3-MAN

In Stock

$ 1,972.99

This product was last offered at the strikethrough price on
10-01-2026

$ 1,799.99 USD

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$ 1,799.99 USD

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The BigPack Kit for the E90/E92 M3 Includes - M3 engine oil cooler - M3 power steering cooler - M3 radiator

DO88 Coolant Hoses - Black - E90/E92 M3

T#:13924825

Part#: DO88KIT94S

In Stock

$ 291.99 USD

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$ 291.99 USD

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Made out of high-quality silicone, these hoses display the highest levels of durability and quality. With three to five layers of armory the hoses are designed to withstand high pressure and heat for an extended period of time. The OE hoses are known to crack and leak but this hose kit eliminates any chance of that.

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VTT Billet Coolant Reservoir Cap - Anodized Clear - Most BMWs 2006+ (...

This coolant cap retains ALL of the factory provisions by simply allowing you to snap t...

2X Entries Into Our F80 M3 Sweepstakes

T#:7530035

Part#: COOLANTCAPRAW

Ships in 4 Business Days

$ 78.99 USD

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$ 78.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Bav Auto Angled Hose Pinch Plier Set - 2pc

10X Entries Into Our F80 M3 Sweepstakes

T#:580379

Part#: B8800058

In Stock

Sale - Save 25% $ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 24.74 USD

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Sale - Save 25%

$ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 24.74 USD

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Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.

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DO88 Coolant Hoses - Blue - E90/E92 M3

T#:13924827

Part#: DO88KIT94B

In Stock

$ 291.99

This product was last offered at the strikethrough price on
08-07-2026

$ 250.99 USD

Limited Qty Sale

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$ 291.99

This product was last offered at the strikethrough price on
08-07-2026

$ 250.99 USD

Limited Qty Sale

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Made out of high-quality silicone, these hoses display the highest levels of durability and quality. With three to five layers of armory the hoses are designed to withstand high pressure and heat for an extended period of time. The OE hoses are known to crack and leak but this hose kit eliminates any chance of that.

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DO88 Race Power Steering Oil Cooler - E90/E92

T#:13891852

Part#: OC120

In Stock at Vendor

$ 646.99 USD

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$ 646.99 USD

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Boasting a 261% increase in core volume, a 100% increase in active cooling area, and a 100% larger oil volume, this power steering oil cooler is an absolute no-brainer. The second one installs wider wheels or stickier tires, the steering servo motor will start getting a run for its money, leaving the opportunity for heat soak. With our of development and rigorous testing, this oil cooler suits track use just as much as street use and is the perfect upgrade for your vehicle!

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DO88 DCT Racing Oil Cooler For E90/E92 M3

T#:13891855

Part#: OC110

In Stock at Vendor

$ 1,299.99 USD

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$ 1,299.99 USD

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With a 217% bigger core volume, 178% bigger cooling area, and a 110% higher oil volume, this oil cooler compensates on no fronts. Built for the track but just as capable on the road, DO88's upgraded oil cooler for the E90/E92 M3 gives you maximum performance and compromises nowhere.

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DO88 Coolant Hoses - Red - E90/E92 M3

T#:13924826

Part#: DO88KIT94R

Ships on Oct 28, 2026

$ 291.99 USD

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$ 291.99 USD

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Made out of high-quality silicone, these hoses display the highest levels of durability and quality. With three to five layers of armory the hoses are designed to withstand high pressure and heat for an extended period of time. The OE hoses are known to crack and leak but this hose kit eliminates any chance of that.

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BMW Motorsports Water Pump w/ Upgraded Aluminum Impeller - E9X M3 ...

T#:5574

Part#: 11518331044

Special Order: No Guaranteed ETA

$ 999.99 USD

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$ 999.99 USD

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Upgrade from the plastic impeller on the stock water pump to this aluminum impeller pump originally developed by BMW for the M3 GT4. This aluminum water pump was designed to stand up to the abuse of racing but can be used on a standard street car.

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VTT Billet Coolant Reservoir Cap - Anodized Black - Most BMWs 2006+ (...

2X Entries Into Our F80 M3 Sweepstakes

T#:7530033

Part#: COOLANTCAPBLK

In Stock

$ 79.99 USD

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$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Red Line Water Wetter Coolant Additive

T#:394769

Part#: REDLINE5A

In Stock

Starting at $ 15.99 USD

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Starting at $ 15.99 USD

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Water Wetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30*F. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze.

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Red Line Water Wetter Heat Transfer Agent

T#:3607

Part#: 1-WW-12Z

In Stock

$ 15.99 USD

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$ 15.99 USD

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Water Wetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30*F. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze. Or it can be added to new or used antifreeze to improve the heat transfer of ethylene and propylene glycol systems. Designed for modern aluminum, cast iron, copper, brass, and bronze systems.

We have been using RedLine Oil in our street cars and race cars for years. Hands-down, it is the Number One brand of high performance lubricant for BMWs.

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Vargas Heater Return Pipe Hose Upgrade - Black - BMW E9X M3

2X Entries Into Our F80 M3 Sweepstakes

T#:52164954

Part#: S65COOLHEATBLK

Ships on Oct 23, 2026

$ 127.99 USD

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$ 127.99 USD

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Upgrade your BMW M3’s engine bay while simultaneously reinforcing your cooling system with the VTT Billet/Silicone Heater Return Pipe Hose.

Vargas Radiator Hose Kit - Black - BMW E9X M3

2X Entries Into Our F80 M3 Sweepstakes

T#:52164958

Part#: S65RHKBLK

Back Ordered

$ 314.99 USD

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$ 314.99 USD

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The VTT S65 Radiator Hose Kit is the premier cooling system upgrade for the BMW E9X M3.

Vargas Lower Radiator Hose - Black - BMW E9X M3

2X Entries Into Our F80 M3 Sweepstakes

T#:52164955

Part#: S65COLLOWBLK

Ships on Oct 23, 2026

$ 179.99 USD

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$ 179.99 USD

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Designed for the S65 V8 engine, the VTT Lower Radiator Hose upgrade addresses the common maintenance headaches associated with aging BMW cooling systems.

Vargas Upper Vent Hose - Black - BMW E9X M3

2X Entries Into Our F80 M3 Sweepstakes

T#:52164960

Part#: S65COUVHBLK

Ships on Oct 23, 2026

$ 74.99 USD

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$ 74.99 USD

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This VTT kit provides a permanent fix by utilizing heavy-duty silicone and anodized billet aluminum ends.

Vargas Water Pump Vent Hose - Black - BMW E9X M3

2X Entries Into Our F80 M3 Sweepstakes

T#:52164956

Part#: S65COPUBLK

Ships on Oct 23, 2026

$ 104.99 USD

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$ 104.99 USD

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Prevent a roadside breakdown with the VTT Billet/Silicone S65 Water Pump Vent Hose, the ultimate maintenance upgrade for your BMW E9X M3.

Vargas Coolant Hose Upgrade Kit - Black - BMW E9X M3

2X Entries Into Our F80 M3 Sweepstakes

T#:52164951

Part#: S65COOLFULLBLK

Ships on Oct 23, 2026

$ 524.99 USD

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$ 524.99 USD

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Upgrade your BMW E9X M3’s engine bay and cooling reliability simultaneously with the Vargas Turbo Technologies S65 Billet/Silicone Full Hose Kit.

Vargas Upper Radiator Hose - Black - BMW E9X M3

2X Entries Into Our F80 M3 Sweepstakes

T#:52164959

Part#: S65COUPRABLK

Ships on Oct 23, 2026

$ 179.99 USD

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$ 179.99 USD

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The VTT Billet/Silicone Upper Radiator Hose is the only solution on the market that addresses both the hose material and the connector integrity simultaneously.

Fluid Level Sensor

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:5973204

Part#: 17117546548

Ships on Oct 30, 2026

$ 13.99 USD

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$ 13.99 USD

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MEYLE-ORIGINAL: True to OE fluid level sensor. Used in multiple locations. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. Comparable OE Cross Reference - 17117546548

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BMW Cooling System Parts & Accessories for BMW E90 M3 S65 4.0L

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