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BMW Drivetrain Parts for BMW E30 M3 S14 2.3L

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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Chase Bays stainless steel Clutch Line - E30

T#:400072

Part#: CB-BMWE30-CLUTCH

Ships in 6 Business Days

$ 106.99 USD

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This product is designed for those who want to eliminate engine bay clutter, improve engine bay aesthetics, improve pedal feel, and/or adapt a new transmission (if applicable). This a FULL replacement one-piece line from the clutch master cylinder to the slave cylinder. Other lines offered just replace the soft line between the stock hard lines. It is made using -3AN stainless steel, Teflon PTFE lined, PVC coated line from the clutch master cylinder to the slave cylinder. Chase Bays' PTFE Teflon inner core hose is manufactured from DuPont's Type 62 fine grade resin, 304 stainless steel wire braid. The hose has a burst pressure of 9000psi. It is chemically resistant and virtually unaffected by all commercial chemicals, acids, alcohols, coolants, hydrocarbons, solvents, synthetic compounds, and hydraulic fluids. More than half of those will hopefully never be on your car (hopefully!). This Clutch Line works for: • BMW E30 with M10 • BMW E30 with M42 • BMW E30 with M44 • BMW E30 with M20 • BMW E30 with M50 • BMW E30 with M52 • BMW E30 with S50 • BMW E30 with S52 • BMW E30 with S54 • BMW E30 with M60 • BMW E30 with M62 / S62

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E30 M3 JB Racing Lightweight Aluminum Flywheel

T#:3768

Part#: 520-050-228

Ships in 3 Business Days

$ 630.00 USD

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$ 630.00 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).

The JB flywheel includes ignition trigger wheel.

Stock Flywheel Weight = 19.5lbs
JB Flywheel Weight = 8.0lbs

This item fits the following BMWs:
1987-1991 E30 BMW M3

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Transmission Mounts E30 M3 BMW Motorsport Group N (Pair)

T#:350970

Part#: 23711417246KT

Ships Jul 30, 2025

$ 289.99 USD

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$ 289.99 USD

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A factory BMW Motorsport part. Made much firmer than factory mounts. These GP N transmission mounts will eliminate transmission movement under hard acceleration/cornering/braking to ensure precise shifting. PRICED PER PAIR

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BMW Drivetrain Parts for BMW E30 M3 S14 2.3L

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Chase Bays stainless steel Clutch Line - E30

E30 M3 JB Racing Lightweight Aluminum Flywheel

Transmission Mounts E30 M3 BMW Motorsport Group N (Pair)

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