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BMW Drivetrain Parts for BMW Z Series E85/6 (2003-2008)

Building your perfect BMW is more than just adding horsepower and stiff suspension. Your drivetrain needs attention in order to deliver power effectively. Most BMWs feature comfortable clutch discs, heavy flywheels, long shifter throws, and open differentials. The drivetrain transmits power to the wheels, but can also be a source of power loss when it is designed for comfort rather than performance. Everything on this page will help you improve your power delivery and driving experience by providing custom Limited Slip Differentials, Short Shift Conversions, Performance Clutch Discs, Lightweight Flywheels, and anything else your BMW needs to be the perfect driving experience.

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Turner Polyurethane Shifter Arm Carrier Bushing - E36 E46 E9X F30 F32...

T#:395189

Part#: 021012TMS02

In Stock

Sale - Save 24% $ 78.99

This product was last offered at the strikethrough price on
06-13-2026

$ 59.99 USD

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Sale - Save 24%

$ 78.99

This product was last offered at the strikethrough price on
06-13-2026

$ 59.99 USD

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Even after rebuilding your manual transmission shifter with brand new BMW components or installing a short shift kit, your shifts will still be at the mercy of soft factory bushings. Designed with 100% comfort and low manufacturing costs in mind, BMW's factory carrier bushing offers a freedom of movement on all axis, resulting in "factory installed slop".

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Turner Titanium Magnetic Differential Drain Plug - M22x1.5

T#:593924

Part#: 027030TMS01

In Stock

Sale - Save 25% $ 89.99

This product was last offered at the strikethrough price on
06-14-2026

$ 67.49 USD

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Sale - Save 25%

$ 89.99

This product was last offered at the strikethrough price on
06-14-2026

$ 67.49 USD

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When both extreme-duty protection and saving every gram matters: the Turner Magnetic Differential Drain Plug.

Turner Titanium Magnetic Manual Transmission Drain Plug - Priced Each...

For vehicles with manual transmission only

T#:638297

Part#: 005976LA01

In Stock

Sale - Save 20% $ 50.99

This product was last offered at the strikethrough price on
06-14-2026

$ 40.79 USD

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Sale - Save 20%

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This product was last offered at the strikethrough price on
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$ 40.79 USD

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This is a must-have for ALL BMWs, and simply installs in place of your existing drain plug. With every fluid change you perform on your BMW, you'll be able to inspect for metal shavings and debris. Many times, if something is going wrong on your BMW's tranmission, the magnetic drain plug can give you an early warning. Replaces genuine BMW transmission drain plug with gasket ring:23117531356

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Turner Titanium Transmission Magnetic Plug - (M18x1.5)

Earn 5% back in Turner Rewards on orders placed 10/28-10/31. Redeem 11/27-12/1. Terms & conditions apply

T#:3772680

Part#: 039634LA01

Ships on Aug 12, 2026

Sale - Save 25% $ 65.99

This product was last offered at the strikethrough price on
06-14-2026

$ 49.49 USD

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Sale - Save 25%

$ 65.99

This product was last offered at the strikethrough price on
06-14-2026

$ 49.49 USD

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Attracts all the metal particles that would otherwise be circulating your transmission.

Differential And LSD Tune

T#:34382136

Part#: BM237HAKT

Ships in 2 Business Days

$ 2,100.00 USD

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$ 2,100.00 USD

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Upgrade to a better performing LSD, includes tune.

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

T#:40748575

Part#: 520010240SGA

Ships on Aug 12, 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 Drivetrain Parts for BMW Z Series E85/6 (2003-2008)

Sub-Categories

Turner Polyurethane Shifter Arm Carrier Bushing - E36 E46 E9X F30 F32...

Turner Titanium Magnetic Differential Drain Plug - M22x1.5

Turner Titanium Magnetic Manual Transmission Drain Plug - Priced Each...

Turner Titanium Transmission Magnetic Plug - (M18x1.5)

Differential And LSD Tune

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

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