BMW Z Series E85/6 (2003-2008)

E60, E82, E85, E9X, E89 (N52 Engine) JB Racing Lightweight Aluminum F...

T#:2801

Part#: 520-200-240

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$ 714.00 USD

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Aluminum flywheels are much lighter than the stock steel flywheel and that produces better throttle response and more available horsepower to the wheels for faster acceleration. The JB Racing aluminum flywheels are a direct replacement for the stock flywheel and work with stock clutch components for an easy upgrade with very little downside.

Modern flywheels are built with additional components and features that are designed to dampen and minimize vibrations from the engine and transmission. As a result they have become bloated in weight and that means more energy is used up just making the flywheel spin. The weight difference between an aluminum and steel flywheel is huge - sometimes more than 50% less. Without the additional mass, more energy can be diverted to where it counts most - moving the car. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines. The dampening effect is just not needed on cars that are focused on performance.

In addition to releasing more power to the wheels, the lighter flywheel allows the engine to spin more freely, which improves throttle response. Again, the difference is huge as you watch the revs build faster than before. With the engine spinning easier the power band comes up much sooner. The stock steel flywheel feels lazy in comparison. There is a driving adjustment required to get used to how much faster the engine revs but that's not really a downside.

The JB lightweight flywheel is designed to be used with a factory organic clutch - the same clutch kit that you would get from any BMW dealer. This makes replacement clutch components easy to source and inexpensive when compared to specialized racing clutches. By using the factory BMW clutch, JB has also made the whole assembly easy to live with when used on the street. The clutch behaves the same as it originally did - just with better throttle response and more power! The JB flywheel can also be rebuilt with a new clutch contact surface - you don't have to buy a new flywheel.

Aluminum flywheels are considered 'single-mass' flywheels because they do not have the same dampening designs as an original 'dual-mass' flywheel. With a single-mass design more noise and vibration may be noticeable. There are steps you can take to minimize the noise - heavier weight transmission oil and clutch discs with anti-rattle springs (sprung-hub clutch).

This JB flywheel replaces the stock flywheel and can be used with either the stock 228mm or stock 240mm clutch discs. Depending on the model you may have either clutch size in your car but this flywheel is compatible with both. You can install a 240mm clutch as a mild upgrade.

Stock Flywheel Weight = 24-31.0lbs
JB Flywheel Weight = 12.0lbs

This item fits the following BMWs:
2006-2010 E60 BMW - 525i, 528i, 530i
2006-2013 E90, E91, E92, E93 BMW - 325i, 328i, 330i
2007-2013 E82 BMW - 125i, 128i
2006-2008 E85, E86 BMW - Z4 3.0i, Z4 3.0si
2009-later E89 BMW - Z4 3.0i

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JB Racing Single Mass Lightweight Aluminum Flywheel - 6-speed - E46 3...

T#:3474

Part#: 520-190-240

Ships in 8 Business Days

$ 672.00 USD

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$ 672.00 USD

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This is a performance replacement for BMW Part # 21207533868 Aluminum flywheels are much lighter than the stock steel flywheel and that produces better throttle response and more available horsepower to the wheels for faster acceleration. The JB Racing aluminum flywheels are a direct replacement for the stock flywheel and work with stock clutch components for an easy upgrade with very little downside.

Modern flywheels are built with additional components and features that are designed to dampen and minimize vibrations from the engine and transmission. As a result they have become bloated in weight and that means more energy is used up just making the flywheel spin. The weight difference between an aluminum and steel flywheel is huge - sometimes more than 50% less. Without the additional mass, more energy can be diverted to where it counts most - moving the car. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines. The dampening effect is just not needed on cars that are focused on performance.

In addition to releasing more power to the wheels, the lighter flywheel allows the engine to spin more freely, which improves throttle response. Again, the difference is huge as you watch the revs build faster than before. With the engine spinning easier the power band comes up much sooner. The stock steel flywheel feels lazy in comparison. There is a driving adjustment required to get used to how much faster the engine revs but that's not really a downside.

The JB lightweight flywheel is designed to be used with a factory organic clutch - the same clutch kit that you would get from any BMW dealer. This makes replacement clutch components easy to source and inexpensive when compared to specialized racing clutches. By using the factory BMW clutch, JB has also made the whole assembly easy to live with when used on the street. The clutch behaves the same as it originally did - just with better throttle response and more power! The JB flywheel can also be rebuilt with a new clutch contact surface - you don't have to buy a new flywheel.

Aluminum flywheels are considered 'single-mass' flywheels because they do not have the same dampening designs as an original 'dual-mass' flywheel. With a single-mass design more noise and vibration may be noticeable. There are steps you can take to minimize the noise - heavier weight transmission oil and clutch discs with anti-rattle springs (sprung-hub clutch).

The JB Flywheel includes the pilot bearing mounted in the flywheel hub, just like the factory configuration.

Stock Flywheel Weight = 25.0lbs
JB Flywheel Weight = 10.5lbs

This item fits the following BMWs:
2002-2005 E46 BMW 325i 330i (with 6-speed manual transmission)

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BMC Filter Cleaning Kit

T#:590913

Part#: WA250-500

In Stock

$ 24.99 USD

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$ 24.99 USD

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Extended Spark Plug Socket

T#:391150

Part#: SUU884506

In Stock

9% off MSRP $ 31.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 28.99 USD

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9% off MSRP

$ 31.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 28.99 USD

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3/8" drive socket with 5/8" opening for most spark plugs

Z4 M HD Clutch and Flywheel Kit

T#:878

Part#: 520-010S-S873G

Ships in 9 Business Days

$ 1,488.61 USD

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$ 1,488.61 USD

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This lightweight aluminum flywheel w/ Heavy Duty "sprung-hub" clutch package is the best-engineered solution for E46 325 and 330 models with the 6-speed transmission, Z4 2.5/3.0, and Z4 M Roadster and M Coupe. Instead of picking a clutch from another car that may or may not work at all, the engineers at JB Racing have taken all of the guess work out of this upgrade and incorporated a Sachs sport sprung-hub clutch with the correct pressure plate and combined it with their most-popular aluminum lightweight flywheel. The Sachs HD clutch disc has a sprung hub to minimize noise and vibration and organic linings to give the feel and engagement of a stock clutch. Mixing and matching of the incorrect clutch, pressure plate, and flywheel components can lead to inconsistent engagement and feel -- why make your clutch feel worse?

In addition, the Sachs HD pressure plate will clamp with greater force -- allowing approximately 350 ft-lbs of torque, which makes it an obvious upgrade from the stock clutch kit. And with the aluminum flywheel weight savings is substantial over the stock dual-mass flywheel - which allows your motor to spool up faster and transmit more HP to the ground.

Because Sachs is an OE supplier to most German cars, replacement parts are just a phone call away. This kit uses the stock throw-out bearing (included in the price).

Z4 M Sport Clutch and Flywheel Applications:
2006-2008 E85 Z4, E86 Z4 Z4 M Roadster, Z4 M Coupe

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7 pc. 3/8" Dr. Spark Plug Socket Set

T#:641915

Part#: 8845D

Ships in 6 Business Days

$ 141.99 USD

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$ 141.99 USD

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Complete set of spark plug sockets.

3/8" Dr. External Star Impact Socket Set

T#:5269512

Part#: 3670SED

Ships on Aug 17, 2026

$ 65.99 USD

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$ 65.99 USD

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CR-MO alloy steel for long life

14 Pc. Full Polish SAE Angle Head Wrench Set

T#:642035

Part#: 9914A

Ships on Aug 17, 2026

$ 113.91 USD

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$ 113.91 USD

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Radius V-Groove design creates an anti-slip while also preventing round-off.

1/2" Drive 24mm Universal Impact Socket

T#:5229449

Part#: 224UMD

Ships on Aug 17, 2026

$ 29.99 USD

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$ 29.99 USD

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Deep Impact Socket on a swivel.

3/8" Dr. Universal Impact Swivel Joint

T#:2528135

Part#: 3301D

Ships on Aug 17, 2026

5% off MSRP $ 26.20

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 24.89 USD

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5% off MSRP

$ 26.20

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 24.89 USD

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Designed for impact use

2 Ton Long Lowrider Service Jack

T#:385986

Part#: 6602LPD

Back Ordered

$ 704.99 USD

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$ 704.99 USD

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Designed to reach far under your vehicle with this long and low chassis

BMC Performance Air Filter - E83

T#:398703

Part#: FB608/20

Back Ordered

$ 89.99 USD

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$ 89.99 USD

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Looking to upgrade your air filter for increased flow and performance? BMC filter allow significantly higher air flow and are perfectly molded in one piece to fit exactly the same as your stock air filter. These filters are constructed from multi-layerd cotton gauze that is pre-oiled and can be cleaned and regenerated using the BMC regeneration kit.

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Oil Filter Socket 32mm

T#:5269518

Part#: 367132D

In Stock

6% off MSRP $ 17.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15.95 USD

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6% off MSRP

$ 17.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15.95 USD

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Make oil filter housing removal simple

6-Ton Jack Stands - Pair

T#:386187

Part#: 1006D

Ships in 6 Business Days

$ 306.99 USD

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$ 306.99 USD

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These jack stands have steel base pads for superior stability

3 Ton Aluminum Floor Jack

T#:385984

Part#: 6603ASJD

Ships in 6 Business Days

$ 720.99 USD

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$ 720.99 USD

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Need a light weight(under 60 Lbs) and heavy duty floor jack? This is the one for you

M50/M52/M54 Beru Racing Spark Plug

T#:338884

Part#: FGR-6DDU

Back Ordered

Sale - Save 17% $ 23.99

This product was last offered at the strikethrough price on
05-14-2026

Starting at $ 20.00 USD

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Sale - Save 17%

$ 23.99

This product was last offered at the strikethrough price on
05-14-2026

Starting at $ 20.00 USD

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RACING SPARK PLUG FOR M50/M52/M54 ENGINES
These spark plugs are recommended by BMW Motorsport for use in their DTC racing engines. We find a slight horsepower increase and greatly increased durability over the OEM road car spark plugs in competition use. We attribute the improvements to the fact that these spark plugs are designed for the high temperatures and cylinder pressures encountered in a racing engine. These spark plugs are a direct replacement and come pre-gapped just like the factory road car plugs.
Please note: these plugs are not for the S54 engine in the E46 M3, MZ3, or Z4 M

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6 Ton Jack Stands - Pair

T#:1793488

Part#: 1006C

Ships on Aug 17, 2026

$ 186.99 USD

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$ 186.99 USD

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Used in pairs for supporting automotive vehicles after lifting

18 Peice Master Brake Caliper Tool Set

T#:5229434

Part#: 3930

Ships on Aug 17, 2026

$ 83.99 USD

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$ 83.99 USD

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An all inclusive brake piston retractor set

Air Ratchet wrench 3/8 in dirve

T#:2528142

Part#: SX113D

Ships on Aug 17, 2026

$ 59.99 USD

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$ 59.99 USD

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With great comfort and design the air ratchet wrench is the perfect tool

10 Pc. 3/8" Dr. Metric Crowfoot Wrench Set

T#:2528137

Part#: 9710MD

Ships on Aug 17, 2026

$ 31.99 USD

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$ 31.99 USD

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Great for lines hoses with nuts and offset nuts.

10 Pc. 3/8" Dr. Metric Torque Adapter Set

T#:5229429

Part#: 910MTAS

Ships on Aug 17, 2026

$ 154.99 USD

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$ 154.99 USD

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Used with a torque wrench to access obstructed fasteners

Pry Bar Set

T#:5269496

Part#: 9704

Ships on Aug 17, 2026

5% off MSRP $ 43.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 41.99 USD

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5% off MSRP

$ 43.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 41.99 USD

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Made of heat treated alloy steel

3/4" Dr. 18mm 12-Point Thin Wall Impact Socket

T#:2706156

Part#: 418MZTD

Ships on Aug 17, 2026

$ 10.99 USD

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$ 10.99 USD

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Throw this thin wall impact for whatever you need!

38 pc Mini Ratchet/Bit Set

T#:2528144

Part#: 9726D

Ships on Aug 17, 2026

15% off MSRP $ 68.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 57.80 USD

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15% off MSRP

$ 68.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 57.80 USD

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Keep this great tool set near by and ready to use.

1/2" Drive 5" Impact Wobble Extension

T#:2706153

Part#: 2505WD

Ships on Aug 17, 2026

20% off MSRP $ 19.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15.99 USD

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20% off MSRP

$ 19.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15.99 USD

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Forged from the finest chrome-molybdenum alloy steel, the best choice for strength

14 Pc. Full Polish Metric Angle Head Wrench Set

T#:2750699

Part#: 9914MA

Ships on Aug 17, 2026

$ 107.39 USD

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$ 107.39 USD

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Fully polished drop forged CR-V alloy steel for maximum strength and service life

3/4" Dr. 26mm Deep Impact Socket

T#:2706159

Part#: 426MDD

Ships on Aug 17, 2026

$ 15.99 USD

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$ 15.99 USD

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Throw this thin wall impact on for whatever you need!

Slide Hammer Puller

T#:2498418

Part#: 3911D

Ships on Aug 17, 2026

$ 99.99 USD

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$ 99.99 USD

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This set covers 8 different functions

7-Piece Oxygen Sensor Socket Set

T#:5282862

Part#: 2850

Ships on Aug 17, 2026

11% off MSRP $ 135.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 119.99 USD

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11% off MSRP

$ 135.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 119.99 USD

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Easily removes vacuum switches, oil pressure sending units, brake light switches, and oxygen sensors on most car models

3/8" Dr. Internal Star Impact Socket Set

T#:5269515

Part#: 3670S

Ships on Aug 17, 2026

$ 62.99 USD

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$ 62.99 USD

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CR-MO alloy steel for long life

3-Ton Jack Stands - Pair

T#:1046638

Part#: 1003C

Ships on Aug 17, 2026

$ 103.99 USD

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$ 103.99 USD

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Use these large base ratcheting jack stands for a very stable base

1/2" Torque Wrench - 30-250 Ft-lb 48 Tooth Torque Wrench

T#:5229461

Part#: 20250

Ships on Aug 17, 2026

$ 218.99 USD

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$ 218.99 USD

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Accurate to ±3% clockwise and ±6% counterclockwise

3/4 Ton Underhoist Stand

T#:34885399

Part#: 6809A

Ships on Aug 17, 2026

$ 227.99 USD

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$ 227.99 USD

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JB Racing Lightweight Steel Flywheel - Grand-Am Legal - E46, MZ3, Z4 ...

T#:40748575

Part#: 520010240SGA

Ships on Aug 17, 2026

$ 868.00 USD

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$ 868.00 USD

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This lightened steel flywheel is specifically designed (and approved) for use in Grand-Am road racing but can also be used as a mild street upgrade if a full aluminum lightweight flywheel is not called for. The Grand-Am flywheel is 20% lighter than stock to meet the rules for the GS and ST classes.Modern flywheels are built with additional components and features that are designed to dampen and minimize vibrations from the engine and transmission. As a result they have become bloated in weight and that means more energy is used up just making the flywheel spin. A lightweight flywheel does away with the dual mass design and its additional mass so more energy can be diverted to where it counts most - moving the car. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines. The dampening effect is just not needed on cars that are focused on performance.

In addition to releasing more power to the wheels, the lighter flywheel allows the engine to spin more freely, which improves throttle response. The engine revs much faster than before. With the engine spinning easier the power band comes up much sooner. The stock steel flywheel feels lazy in comparison. There is a driving adjustment required to get used to how much faster the engine revs but that's not really a downside.

Grand-Am approved this flywheel to be used with a factory E36 M3 clutch. This opens up a lot of clutch and pressure plate options but we typically used this with a stock Sachs OEM clutch kit. This makes replacement clutch components easy to source and inexpensive when compared to specialized racing clutches.

Lightweight flywheels are considered 'single-mass' flywheels because they do not have the same dampening designs as an original 'dual-mass' flywheel. With a single-mass design more noise and vibration may be noticeable. There are steps you can take to minimize the noise - heavier weight transmission oil and clutch discs with anti-rattle springs (sprung-hub clutch). In addition to the standard replacement clutches, we also sell Sachs Performance sprung hub clutches that also work with the JB flywheels.

If being used on a 330i 6-speed or Z4 6-speed an additional pilot bearing hub is required. Select your appropriate model and transmission from the list below.

Stock Flywheel Weight = 25.0lbs
JB Flywheel Weight = 20.0lbs

This item fits the following BMWs:
2001-2002 E46 BMW 330i 330ci 5-speed
2003-2006 E46 BMW 330i 330ci 6-speed
2001-2006 E46 BMW M3
1998-2002 Z3 BMW Z3 M Roadster M Coupe
2003-2005 E85 BMW Z4 2.5i Z4 3.0i

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BMW Z Series E85/6 (2003-2008)

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