BMW Drivetrain Parts for BMW E21 320i M10 1.8L

Clear BMW chassis

Please ensure your correct model is selected

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.

Sub-Categories

Sort By:

OEM Rein Magnetic Differential Oil Drain Plug - M22x1.5 - Most BMW & ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:38890943
Part#: HWU0065
In Stock
$ 23.99 USD
Free Shipping on orders $49 and up
$ 23.99 USD
Free Shipping on orders $49 and up
As components in the differential begin to wear, metal particles become loose in the diff fluid, which can lead to excess wear. This magnetic plug pulls these particles out of suspension, helping to reduce wear over time. Replaces BMW # 33117525064
Show More Show Less
IRP Universal Short Shifter V3 CS (Centering Spring) - Black Reverse ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
IRP - Individual Racing Parts - Corporate Logo
T#:569029
Part#: IRPSS-3BCS
In Stock
$ 475.99 USD
Free Shipping
$ 475.99 USD
Free Shipping
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.
Show More Show Less
IRP BMW Short Shifter Dust Boot - For IRP V2, V3 & V3 CS Short Shifte...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
IRP - Individual Racing Parts - Corporate Logo
T#:569037
Part#: IRPSS-DB
Ships in 3 Business Days
$ 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.
Show More Show Less

IRP Universal Short shifter V3 - Black Reverse Button
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
IRP - Individual Racing Parts - Corporate Logo
T#:401279
Part#: IRPSS-3B
Ships on Sep 16, 2026
$ 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.
Show More Show Less

IRP V2 Short shifter - BMW 5 & 6 Speed
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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.
Show More Show Less
IRP Performance Aluminum & Polyurethane Flex Disc - E21 E28 E30 E36 Z...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
IRP - Individual Racing Parts - Corporate Logo
T#:401429
Part#: IRPFD-78-10
Special Order: No Guaranteed ETA
$ 123.99 USD
Free Shipping
$ 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

Show More Show Less

Rein Driveshaft Center Support Bearing
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379700
Part#: 26121225071
In Stock
$ 13.50 USD
Free Shipping on orders $49 and up
$ 13.50 USD
Free Shipping on orders $49 and up
Commonly referred to as "carrier bearing"
OEM Rein CV Boot Repair Kit - E21 E10
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:12274
Part#: 33219067911
Ships in 2 Business Days
$ 10.99 USD
Free Shipping on orders $49 and up
This is the OEM Rein rear axle boot kit for the CV joint. The kit includes the boot, clip, clamp, and grease.

Rein TRANSMISSION SEAL (40X58X10) - E12, E21
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:19834
Part#: 24111207426
Ships in 4 Business Days
$ 13.99 USD
Free Shipping on orders $49 and up
The input shaft seal on your transmission ensures that you will not experience any fluid loss from behind the guide sleeve. If you have a leak, be sure to replace it as soon as possible to avoid losing too much fluid, which can ultimately damage your transmission. For front wheel drive vehicles equipped with manual transmissions only.
Show More Show Less

OEM Rein Driveshaft Center Support Bearing - E21 E28 E10 E12 E23 E24 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379750
Part#: 26111206502
Back Ordered
$ 23.99

This product was last offered at the strikethrough price on
06-26-2026

$ 18.99 USD
Free Shipping on orders $49 and up
$ 18.99 USD
Free Shipping on orders $49 and up
Center support bearings help to add some support to the driveshaft in a BMW. Because it is designed to be a two piece system, bracing needs to be added to the center to keep your driveshaft in line and tight. If you are noticing excessive vibration or gear noise in your vehicle, it may be time to replace the support bearing.
Show More Show Less
Rein Selector Rod Shaft Seal - E12, E21, E23, E24, E28
For vehicles with a production date from 04/1977
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592120
Part#: 24527509500
Ships in 2 Business Days
$ 4.07 USD
Free Shipping on orders $49 and up
$ 4.07 USD
Free Shipping on orders $49 and up
10x18x5mm seal - stop leaks in their tracks
OEM Rein Transmission Input Shaft Seal - E12 E21 E23 E24 E28 E30 E31 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379685
Part#: 24311422671
Ships in 4 Business Days
$ 10.99 USD
Free Shipping on orders $49 and up
The input shaft seal on your transmission ensures that you will not experience any fluid loss from behind the guide sleeve. If you have a leak, be sure to replace it as soon as possible to avoid losing too much fluid, which can ultimately damage your transmission.
Show More Show Less


Rein Differential Drain Plug Gasket
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:19654
Part#: 07119963355
Ships in 5 Business Days
$ 2.03 USD
Free Shipping on orders $49 and up
GASKET RING for various sensors and seals.