BMW Drivetrain Parts for BMW E21 320i M10 1.8L

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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 Titanium Magnetic Differential Drain Plug - M22x1.5
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Turner Motorsport - Corporate Logo
T#:593924
Part#: 027030TMS01
In Stock
Sale - Save 30% $ 85.99
$ 60.19 USD
Free Shipping
Sale - Save 30% $ 85.99
$ 60.19 USD
Free Shipping
When both extreme-duty protection and saving every gram matters: the Turner Magnetic Differential Drain Plug.
Flywheel Torque Plate - M10/M20/M30/S14
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:39971063
Part#: 044923LA01
In Stock
New Item
$ 24.99 USD
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$ 24.99 USD
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Engineered in-house, our torque plate is designed to provide a robust and uniform clamping surface between the flywheel and crankshaft across a range of BMW engine applications. Compatible with both factory and Turner performance flywheels, it helps prevent surface galling and ensures consistent torque distribution during installation.

Features:

Prevents galling and wear at the crankshaft-to-flywheel interface under high clamping loads
Promotes even load distribution for improved fastener integrity and long-term reliability
Compatible with a variety of BMW flywheel setups, including OEM and aftermarket configurations
Design:

Precision-machined from cold rolled steel for high strength and dimensional accuracy
Heat treated to 32 HRC for increased surface hardness and wear resistance
Clear zinc anodized for enhanced corrosion protection
Laser-etched Turner logo
Ideal for performance builds and drivetrain refreshes, this torque plate is a critical component for maintaining proper flywheel installation and maximizing long-term durability across multiple BMW platforms.

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IRP - Individual Racing Parts - Corporate Logo
T#:569037
Part#: IRPSS-DB
In Stock
$ 52.99 USD
Free Shipping on orders $49 and up
Developed specifically for the IRP V2, V3, and V3 CS Short shifters, this Dust Boot mounts to the short shifters base to keep out dirt and noise that would normally come through the otherwise unprotected opening in your center console.
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IRP - Individual Racing Parts - Corporate Logo
T#:569029
Part#: IRPSS-3BCS
In Stock
$ 466.99 USD
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$ 466.99 USD
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IRP (Individual Race Parts) is a performance aftermarket parts company that focuses on high quality and long term reliability. The Universal Short Shifter V3 CS was developed to express their belief and compete with the much more expensive CAE Ultra Shifter, but at half the cost. The entire shifter assembly is made from all anodized aluminum and stainless steel for strength, durability, and looks. The V3 CS is a perfect replacement when looking for a shifter that gives you short, crisp, precise shifts with a 60% reduction in travel, plus a new return to center feature.
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IRP - Individual Racing Parts - Corporate Logo
T#:401429
Part#: IRPFD-78-10
In Stock
$ 123.99 USD
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$ 123.99 USD
Free Shipping

Stock rubber flex discs allow for a slight amount of give, especially under heavy acceleration and, depending on the amount of force applied, could potentially tear or split. This slight flex/give can prevent instantaneous transfer of force to the wheels, making accelerations unpredictable, or even lead to your vehicle being stuck on the side of the track. To combat this, IRP's Performance Flex Disc was developed. Made of CNC machined aluminum, this flex disc won't actually flex, and the polyurethane bushings will only provide a enough give to dampen some vibrations and prevent damaging the transmission. This is perfect for high torque applications such a drag cars and dedicated track cars that want immediate response and long term reliability.

78mm Diameter with fitment for M10 nuts/bolts.

Fits the following BMWs:
1977-1983  E21  - 320i 
1983-5/1986  E28  - 528e - Manual Transmission 
5/1986-1988  E28  - 528e - Manual or Automatic Transmission 
1984-1991  E30  - 318i, 318is, & 318ic 
1984-1986  E30  - 325e/es (thru 04/1986) 
1986-1991  E30  - 325i, 325is, 325ic 
1987-1991  E30  - 325ix 
1992-1997  E36  - 318i 318is 318ic - For Automatic Transmission only 
1996-1998  Z3  - Z3 1.9 liter roadster

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IRP - Individual Racing Parts - Corporate Logo
T#:401279
Part#: IRPSS-3B
In Stock
$ 536.99 USD
Free Shipping
$ 536.99 USD
Free Shipping
The shifter in manual BMWs are said to provide a perfect blend of a sporty and comfortable feel. For some, this is perfect. For others that daily drive or track their BMW, they want shorter shifter travel and a much tighter feel. If you are one of these people, then we have a great option for you, the Short Shifter V3 from IRP, the successor of the V2.
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AC Hydraulic - Corporate Logo
T#:41728758
Part#: TOL-VL6
Ships in 3 Business Days
New Item
19% off MSRP $ 667.00
$ 539.99 USD
19% off MSRP $ 667.00
$ 539.99 USD
Having a transmission jack can prevent a lot of struggling and exhaustion from attempting to install a transmission by hand or through some other sketchy method we have all considered. AC Hydraulic's VL3 Transmission Jack is a great transmission jack that will alleviate these issues. In addition to being used for the transmisison, this jack is also great for other lifting operations such as the mounting of springs, fuel tanks, exhaust pipes, and more.
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Performance Tool - Corporate Logo
T#:1809145
Part#: W80510
Ships in 1 Business Day
$ 32.44 USD
Free Shipping on orders $49 and up
For turning and holding flexplates and flywheels.

JB Racing - Corporate Logo
T#:3647
Part#: 520-110-215
Ships in 5 Business Days
$ 581.00 USD
Free Shipping
$ 581.00 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 be rebuilt too with a new clutch contact surface.

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).

Stock Flywheel Weight = 16.5lbs
JB Flywheel Weight = 8lbs

This item fits the following BMWs:
1974-1976 2002 BMW 2002
1977-1983 E21 BMW 320i
1984-1985 E30 BMW 318i
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IRP - Individual Racing Parts - Corporate Logo
T#:401261
Part#: IRPSS-2B
Special Order: No Guaranteed ETA
$ 420.99 USD
Free Shipping
$ 420.99 USD
Free Shipping
The shifter in manual BMWs are said to provide a perfect blend of a sporty and comfortable feel. For some, this is perfect. For others that daily drive or track their BMW, they want shorter shifter travel and a much tighter feel. If you are one of these people, then we have a great option for you, the Short Shifter V2 from IRP.
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Performance Tool - Corporate Logo
T#:1809158
Part#: W1141
In Stock
$ 9.99 USD
Free Shipping on orders $49 and up
Fits all standard gallon bottles
Kingsborne - Corporate Logo
T#:5423
Part#: TLS-33-28
In Stock
$ 18.99 USD
Free Shipping on orders $49 and up
This clutch alignment tool exactly replicates the shaft and splines of the vehicle's drive shaft. It is made of high quality polypropylene injected plastics and insures perfect alignment of the clutch. Extremely durable, the clutch tool can be used over and over again. A must for anybody replacing a clutch.

This item fits the following BMWs:
1970-1976 2002 BMW 1600 2002 2002tii
1984-1985 E30 BMW 318i 318is 318ic
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix M3
1982-1988 E28 BMW 524td 528e 533i 535i 535is M5
1982-1989 E24 BMW 633csi 635csi M6
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Performance Tool - Corporate Logo
T#:5095675
Part#: W1139
Ships in 2 Business Days
$ 10.99 USD
Free Shipping on orders $49 and up
Unique double threaded cap fits both quart and gallon size containers.
Performance Tool - Corporate Logo
T#:5122269
Part#: W83011
Ships in 1 Business Day
$ 23.31 USD
Free Shipping on orders $49 and up
Helpful tool for proper axle boot installations.
Performance Tool - Corporate Logo
T#:1809134
Part#: W1145
Ships in 1 Business Day
$ 18.80 USD
Free Shipping on orders $49 and up
Quickly and easily transfer any fluid.

Performance Tool - Corporate Logo
T#:1855988
Part#: W83013
Ships Jul 8, 2025
$ 20.40 USD
Free Shipping on orders $49 and up
Used on ear-type clamps found on CV joints, hoses, and some fuel filters.

SACHS Performance - Corporate Logo
T#:393843
Part#: 881864999758
Ships Jul 8, 2025
$ 448.99 USD
Free Shipping
$ 448.99 USD
Free Shipping

Looking to upgrade your clutch disc? This Sachs Performance clutch disc is a great option. Allowing for higher torque and horsepower, this disc is perfect for aggressive track applications such as endurance racing, clubsport, autocross, hill climbing and 1/4 mile racing.

Sachs Performance is the racing and performance oriented selection of high quality parts from Sachs and ZF Engineering. Supplying countless brands with OE parts and offering one of the widest selection of OEM replacement parts, they are known for their exceptionally high quality products. You can purchase these performance parts with confidence, knowing they will resist heavy wear and tear for much longer than most other aftermarket options.

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