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Performance Clutch Kits

A performance clutch kit will allow you to drive harder under increased power levels while making sure there is nothing lost to the drivetrain. If you track your vehicle or have raised the maximum horsepower through tuning or modification, chances are you will see increased benefit by installing a high performance aftermarket clutch.
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ACT - Corporate Logo
T#:567293
Part#: BM9-XTSS
In Stock at Vendor
$ 949.00 USD
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$ 949.00 USD
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### **BM9-XTSS Clutch Kit – Engineered for Peak Performance** The **BM9-XTSS Clutch Kit** is designed for enthusiasts who demand maximum performance and durability. Featuring an **ACT Xtreme pressure plate**, this kit delivers **higher clamp load, reduced deflection, and extended clutch life**—ideal for spirited street driving and track use. Each diaphragm undergoes a **four-stage heat-treatment process**, ensuring superior strength and longevity. **Precision cover stampings** enhance rigidity, providing a significant upgrade over stock components. Paired with **ACT’s Performance Street Disc**, this kit utilizes **steel-backed organic friction material** with **high copper content** for **better heat dissipation and burst strength**. Its **reduced marcel design** allows for **quicker, smoother shifts**, perfectly complementing the Xtreme pressure plate. Expect **quiet operation, enhanced durability, and long-term reliability**, making it a top choice for performance-driven drivers. ### **Key Features:** - **Pedal Feel:** Moderate to heavy effort, smooth engagement, and minimal gear rattle. - **Extended Lifespan:** ACT’s exclusive diaphragm design ensures longer-lasting friction material. - **Precision Engineering:** Optimized for **heat resistance, fade reduction, and maximum durability**. Upgrade your drivetrain with confidence—the **ACT BM9-XTSS Clutch Kit** is built to handle the pressure. 🚗💨
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Advanced Clutch Technology Xtreme Sprung Street Performance Clutch Ki...
Must be used with ACT or Turner Lightweight flywheel
ACT - Corporate Logo
T#:638329
Part#: BM14-XTSS
In Stock
$ 927.00 USD
Free Shipping
$ 927.00 USD
Free Shipping

Advanced Clutch Technology (ACT) designs, engineers and develops products by leveraging decades of track and performance street experience. Advanced CAD, FEA simulation, and CAM tools help ensure highly optimized performance, reliability, and repeatability. These key advantages are produced by combining the best engineering and design methodologies with the latest in materials and manufacturing techniques.

ACT clutch kits stand unequaled in terms of consistent pedal feel, high torque capacity, long wear life and durability. In-house manufacturing is critical in tuning components specifically to each individual application while maintaining the predictable ACT pedal feel across the entire catalog.

This clutch kit features an Xtreme pressure plate, a Performance Street sprung clutch disc, and an XACT Streetlite Flywheel.

Their Xtreme pressure plate offers a 50-120% clamp load increase, moderate to heavy pedal feel, and is recommended for high performance street and racing applications. All diaphragms went through a four stage heating process for increased strength and unparalleled performance.

Next in this kit is the Performance Street clutch disc. This is the most popular sprung clutch disc and features high quality organic friction material with a high copper content for improved heat transfer and a steel backed lining for increased strength in burst load circumstances. This organic clutch disc has a significantly higher torque capacity than a stock disc but still retains a long life span and operates quietly and reliably.

 

Clutch Kit Specs:

  • Torque Rating: 520 ft/lbs
  • 68% torque capacity increase over stock!
  • Type of Disc: Street
  • 26-count spline
  • Spline Size: 1-3/8" inch
  • Disc Weight: 3.5 lbs
  • Pressure Plate Weight: 10.7 lbs
  • 1 year Warranty from retail purchase date!
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JB Racing - Corporate Logo
T#:3763
Part#: 520-070-228
Ships in 5 Business Days
$ 630.00 USD
Free Shipping
$ 630.00 USD
Free Shipping
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.

This flywheel replaces the stock original single-mass flywheel and should only be used with the corresponding 'single-mass' clutch kit. According to BMW the single mass flywheel was installed in all 325e up to 5/86 production date but we have seen some later cars with a single-mass flywheel. The age of the car almost guarantees one or more clutch replacements and possibly a change to the original flywheel as well. You may not know which flywheel is currently installed until the flywheel cover or the transmission is removed.

Stock Flywheel Weight = 24.0lbs
JB Flywheel Weight = 8.5lbs

This item fits the following BMWs:
1984-1988 E30 BMW 325e 325es (with single mass flywheel)
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JB Racing - Corporate Logo
T#:340509
Part#: WCCLUTCH
Ships in 5 Business Days
Starting at $ 1,999.00 USD
Free Shipping
Starting at $ 1,999.00 USD
Free Shipping
The ultimate in a racing flywheel and clutch! This was developed for use in our E36 and E46 World Challenge Touring Cars. The combined weight of the clutch and flywheel is only 11lbs!!!

This multi-disc (2 or 3 disc setups) offer a minimal flywheel mass (enough to include a factory ring gear for the starter) and a small 5.5" clutch assembly rated to 500hp. By saving as much weight as possible less energy is used in simply spinning the flywheel/clutch assembly and that means a lot more power and torque is available at the drive wheels. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines and this is among the most advanced and lightest racing clutch kits available for your BMW race car.

The JB Ultra-Light Performance racing clutch is available in 2-disc or 3-disc setups. We used the 5.5"/140mm size in our Touring Cars but larger sizes are available too. This is a turn-key racing clutch and flywheel kit that you don't have to engineer or spec yourself. This is the same clutch setup we used when winning the 2003 and 2004 Touring Car Championships - the quality and performance is unquestionable. That series also employed standing starts at each race and this clutch setup performed flawlessly with nearly a full season of racing on them before needing a change.

JB Ultra-Light flywheels include:
  • precision CNC machined aluminum flywheel
  • zero-balanced up to 10,000 RPM
  • replaceable hardened steel clutch friction surface
  • Helicoil threaded inserts
  • high-strength grade 10.9 hardware
  • multi-disc racing clutch with Performance racing pressure plate
  • JB Racing throw-out bearing with custom bobbin
    This is a true racing clutch and will not function as a street-able clutch at all. It behaves as an on/off switch with no slippage allowed. Extreme care must be used when driving on to trailers and around the paddock. But when driven correctly the life span of this clutch is amazing - we could get a full season of racing a 300hp M54 from this clutch setup including standing starts at every race! Replacement clutch components and flywheel rebuilding are available.

    A properly adjusted clutch stop is required for use with this clutch kit.

    Stock Flywheel + Clutch Weight = 45+lbs
    JB Ultra-Light Flywheel & Clutch Weight = 11lbs

    This item fits the following BMWs:
    1992-1999 E36 BMW 325i 325is 328i 328is M3
    1999-2006 E46 BMW 323i 323ci 325i 325ci 328i 328ci 330i 330ci (5-speed)
    1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
    2003-2005 E85 BMW Z4 2.5i (5-speed)
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    ACT - Corporate Logo
    T#:825815
    Part#: BM14-XTR6
    In Stock
    $ 916.00 USD
    Free Shipping
    $ 916.00 USD
    Free Shipping

    Advanced Clutch Technology (ACT) designs, engineers and develops products by leveraging decades of track and performance street experience. Advanced CAD, FEA simulation, and CAM tools help ensure highly optimized performance, reliability, and repeatability. These key advantages are produced by combining the best engineering and design methodologies with the latest in materials and manufacturing techniques.

    ACT clutch kits stand unequaled in terms of consistent pedal feel, high torque capacity, long wear life and durability. In-house manufacturing is critical in tuning components specifically to each individual application while maintaining the predictable ACT pedal feel across the entire catalog.

    This clutch kit features an Xtreme pressure plate and an R6 racing clutch disc.

    Their Xtreme pressure plate offers a 50-120% clamp load increase, moderate to heavy pedal feel, and is recommended for high performance street and racing applications. All diaphragms went through a four stage heating process for increased strength and unparalleled performance.

    Next in this kit is the R6 racing clutch disc. This disc is an unsprung, rigid disc with 6 pads that is best suited for drag and road racing and handles heat better thanks to its increased surface contact area versus the 4 pad version of this disc, the R4. The R6 pads are composed of ceramic friction materials and the disc has a chome-moly hub that is heat treated for additional strength under high load engagements. Over stock, this disc is much better for faster shifting and significantly higher torque loads. Unlike the stock disc, this racing disk has a slightly shortened life span due to its rigid design and pad composition. This in turn is offset thanks to its fast, aggressive engagement for track use.

    Clutch Kit Specs:

    • Torque Rating: 665 ft/lbs
    • 117% torque capacity increase over stock!
    • Type of Disc: Racing
    • 26-count spline
    • Spline Size: 1-3/8" inch
    • Disc Weight: 4 lbs
    • Pressure Plate Weight: 10.7 lbs
    • 1 year Warranty from retail purchase date!
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    JB Racing - Corporate Logo
    T#:3749
    Part#: 520-120-228
    In Stock
    $ 854.00 USD
    Free Shipping
    $ 854.00 USD
    Free Shipping
    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.

    This flywheel replaces the stock original dual-mass flywheel and should only be used with the corresponding 'dual-mass' clutch kit. According to BMW the dual mass flywheel was installed in all 325/325e from 5/86 on but we have seen some later cars with a single-mass flywheel. The age of the car almost guarantees one or more clutch replacements and possibly a change to the original flywheel as well. You may not know which flywheel is currently installed until the flywheel cover or the transmission is removed.

    Stock Flywheel Weight = 27.5lbs
    JB Flywheel Weight = 10.0lbs

    This item fits the following BMWs:
    1984-1988 E30 BMW 325e 325es (with dual mass flywheel)
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    ACT - Corporate Logo
    T#:552756
    Part#: BM2-HDSS
    In Stock at Vendor
    $ 673.00 USD
    Free Shipping
    $ 673.00 USD
    Free Shipping

    Advanced Clutch Technology (ACT) designs, engineers and develops products by leveraging decades of track and performance street experience. Advanced CAD, FEA simulation, and CAM tools help ensure highly optimized performance, reliability, and repeatability. These key advantages are produced by combining the best engineering and design methodologies with the latest in materials and manufacturing techniques.

    ACT clutch kits stand unequaled in terms of consistent pedal feel, high torque capacity, long wear life and durability. In-house manufacturing is critical in tuning components specifically to each individual application while maintaining the predictable ACT pedal feel across the entire catalog.

    This clutch kit is their most popular and features a Heavy Duty pressure plate and a Performance Street sprung clutch disc.

    **Must be used with an ACT XACT Streetlite Flywheel, Part number: 600315**

    The heavy duty pressure plate included offers a 20-50% clamp load increase, stock-moderate  pedal feel, and heat treated diaphragms for increased strength and performance.

    Next in this kit is the Performance Street clutch disc. This is the most popular sprung clutch disc and features high quality organic friction material with a high copper content for improved heat transfer and a steel backed lining for increased strength in burst load circumstances. This organic clutch disc has a significantly higher torque capacity than a stock disc but still retains a long life span and operates quietly and reliably.

    Clutch Kit Specifications:

    • Part Number: BM2-HDSS
    • Description: HD/Perf Street Sprung
    • Torque Capacity (ft/lbs.): 270
    • Torque Capacity Over OE: 20%
    • Disc Type: Street Disc
    • Spline Count: 14
    • Spline Size (in.): 1
    • Disc Diameter (in.): 8.4
    • Disc Diameter (mm.): 214
    • Pressure Plate Type: Heavy Duty
    • Product Weight (lbs.): 11.1
    • Kit Contents: 3000802ATGM06B012RB131
    • Warranty (Product Warranty): One (1) Year from Retail Purchase
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    ACT - Corporate Logo
    T#:552760
    Part#: BM2-HDG6
    Ships in 6 Business Days
    $ 693.00 USD
    Free Shipping
    $ 693.00 USD
    Free Shipping

    Advanced Clutch Technology (ACT) designs, engineers and develops products by leveraging decades of track and performance street experience. Advanced CAD, FEA simulation, and CAM tools help ensure highly optimized performance, reliability, and repeatability. These key advantages are produced by combining the best engineering and design methodologies with the latest in materials and manufacturing techniques.

    ACT clutch kits stand unequaled in terms of consistent pedal feel, high torque capacity, long wear life and durability. In-house manufacturing is critical in tuning components specifically to each individual application while maintaining the predictable ACT pedal feel across the entire catalog.

    This clutch kit features a Heavy Duty pressure plate and a G6 racing clutch disc.

    **Must be used with an ACT XACT Streetlite Flywheel, Part number: 600315**

    The heavy duty pressure plate included offers a 20-50% clamp load increase, stock-moderate  pedal feel, and heat treated diaphragms for increased strength and performance.

    Next in this kit is the G6 racing clutch disc. This disc is a sprung, 6-pad disc that is suited for high horsepower road and track style racing and is also better at handling higher heat versus the 4-pad version of this disc, the G4. The G6 pads are composed of ceramic friction materials and the disc has a chome-moly hub that is heat treated for additional strength under high load engagements. Also featured are heavy duty torsional springs that are rated for the clutch kit's expected uses. Over stock, this clutch kit has a much higher torque capacity and is better for quick shifting thanks to lower weight and inertia. Despite its ceramic racing style pads, this disc has great durability. In turn, these pads provide higher heat tolerances and faster, more aggressive clutch engagements.

    Specifications:

    • Part Number: BM2-HDG6
    • Description: HD/Race Sprung 6 Pad
    • Torque Capacity (ft/lbs.): 345
    • Torque Capacity Over OE: 54%
    • Disc Type: Race Disc
    • Spline Count: 14
    • Spline Size (in.): 1
    • Disc Diameter (in.): 8.4
    • Disc Diameter (mm.): 214
    • Pressure Plate Type: Heavy Duty
    • Product Weight (lbs.): 11.8
    • Kit Contents: 6214122ATGM06B012RB131
    • Warranty (Product Warranty): One (1) Year from Retail Purchase
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    ACT - Corporate Logo
    T#:552763
    Part#: 600315
    In Stock at Vendor
    $ 574.00 USD
    Free Shipping
    $ 574.00 USD
    Free Shipping

    600315 is a Streetlite flywheel, which is considerably lighter than stock and is the most durable flywheel offering from ACT. Materials are properly distributed for maximum strength, lower inertia, good heat tolerance and rigidity. ACT's Streetlite flywheels are preferred for street or drag racing. ACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts.

    Feel: Noticeably improved engine response and acceleration, OE to mild gear rattle;

    Life: Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life;

    Quality: One piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears;

    Recommended Use: Recommended for street and race use;

    ACT Difference: Forged, CNC machined and dynamically computer balanced for smooth high RPM reliability;

     

    For use with ACT clutch kits only.

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    ACT - Corporate Logo
    T#:567306
    Part#: BM9-HDSSKT
    In Stock at Vendor
    $ 1,645.00 USD
    Free Shipping
    $ 1,645.00 USD
    Free Shipping

    Every design is thoroughly researched and tested prior to release to guarantee their products meet and exceed the customer's expectations. Careful attention is payed to factors such as engine torque, maximum RPM, drive type (FWD, RWD, AWD), and the type of driving being done, such as street, sport, track events, racing, etc. ACT's clutch kits are competitively priced, often with  specifications greater than competitor's and at a higher quality.

    This clutch kit features a Xtreme pressure plate, an G6 racing clutch disc, and an XACT Streetlite Flywheel.

    Their Xtreme pressure plate offers a 50-120% clamp load increase, moderate to heavy pedal feel, and is recommended for high performance street and racing applications. All diaphragms went through a four stage heating process for increased strength and unparalleled performance.

    The G6 clutch disc is a sprung, 6-pad racing disc that is recommended for high horsepower street and race us and is better at handling high heat than the 4-pad disc. Its material composition is high quality, ceramic friction materials and a heavy duty torsional dampening springs that are rate for this clutch disc's size and expected uses. It has an increased torque capacity, and is better for faster shifting with its low weight and inertia. Being a racing disc, it has good durability and its ceramic composition allows for high heat tolerances. It also has a fast, aggressive engagement in comparison to standard street-use clutch discs.

    The XACT Streetlite Flywheel is their most popular flywheel as it is great for both street and drag racing. It allows your engine to rev quicker, giving you increased throttle response, and is considerably lighter than your stock flywheel thanks to its light single-mass design, all while still being very durable!

    Clutch Kit Specs:

    • Torque Rating: 465 ft/lbs
    • 52% torque capacity increase over stock!
    • Type of Disc: Street
    • 10-count spline
    • Spline Size: 1-3/8" inch
    • Flywheel Weight: 15.1 lbs
    • 1 year Warranty from retail purchase date!
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    JB Racing - Corporate Logo
    T#:5774218
    Part#: 520-210-215
    Ships in 5 Business Days
    $ 1,106.00 USD
    Free Shipping
    $ 1,106.00 USD
    Free Shipping
    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.
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    ACT - Corporate Logo
    T#:552761
    Part#: BM2-HDG4
    Ships in 6 Business Days
    $ 645.00 USD
    Free Shipping
    $ 645.00 USD
    Free Shipping

    Advanced Clutch Technology (ACT) designs, engineers and develops products by leveraging decades of track and performance street experience. Advanced CAD, FEA simulation, and CAM tools help ensure highly optimized performance, reliability, and repeatability. These key advantages are produced by combining the best engineering and design methodologies with the latest in materials and manufacturing techniques.

    ACT clutch kits stand unequaled in terms of consistent pedal feel, high torque capacity, long wear life and durability. In-house manufacturing is critical in tuning components specifically to each individual application while maintaining the predictable ACT pedal feel across the entire catalog.

    This clutch kit features a Heavy Duty pressure plate and a G6 racing clutch disc.

    **Must be used with an ACT XACT Streetlite Flywheel, Part number: 600315**

    The heavy duty pressure plate included offers a 20-50% clamp load increase, stock-moderate  pedal feel, and heat treated diaphragms for increased strength and performance.

    Next in this kit is the G4 racing clutch disc. This disc is a sprung, 4-pad disc that is suited for high horsepower road and track style racing. The G4 pads are composed of ceramic friction materials and the disc has a chome-moly hub that is heat treated for additional strength under high load engagements. Also featured are heavy duty torsional springs that are rated for the clutch kit's expected uses. Over stock, this clutch kit has a much higher torque capacity and is better for quick shifting thanks to lower weight and inertia. Despite its ceramic racing style pads, this disc has great durability. In turn, these pads provide higher heat tolerances and faster, more aggressive clutch engagements.

    Specifications:

    • Part Number: BM2-HDG4
    • Description: HD/Race Sprung 4 Pad
    • Torque Capacity (ft/lbs.): 345
    • Torque Capacity Over OE: 54%
    • Disc Type: Race Disc
    • Spline Count: 14
    • Spline Size (in.): 1
    • Disc Diameter (in.): 8.4
    • Disc Diameter (mm.): 214
    • Pressure Plate Type: Heavy Duty
    • Product Weight (lbs.): 11.2
    • Kit Contents: 4214122ATGM06B012RB131
    • Warranty (Product Warranty): One (1) Year from Retail Purchase
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    ACT - Corporate Logo
    T#:552758
    Part#: BM2-HDR4
    Ships in 6 Business Days
    $ 621.00 USD
    Free Shipping
    $ 621.00 USD
    Free Shipping

    Advanced Clutch Technology (ACT) designs, engineers and develops products by leveraging decades of track and performance street experience. Advanced CAD, FEA simulation, and CAM tools help ensure highly optimized performance, reliability, and repeatability. These key advantages are produced by combining the best engineering and design methodologies with the latest in materials and manufacturing techniques.

    ACT clutch kits stand unequaled in terms of consistent pedal feel, high torque capacity, long wear life and durability. In-house manufacturing is critical in tuning components specifically to each individual application while maintaining the predictable ACT pedal feel across the entire catalog.

    This clutch kit features a Heavy Duty pressure plate and R4 racing clutch disc

    **Must be used with an ACT XACT Streetlite Flywheel, Part number: 600315**

    The heavy duty pressure plate included offers a 20-50% clamp load increase, stock-moderate  pedal feel, and heat treated diaphragms for increased strength and performance.

    Next in this kit is the R4 racing clutch disc. This disc is an unsprung, rigid disc with 4 pads that is best suited for drag and road racing. The R4 pads are composed of ceramic friction materials and the disc has a chome-moly hub that is heat treated for additional strength under high load engagements. Over stock, this disc is much better for faster shifting and significantly higher torque loads. Unlike the stock disc, this racing disk has a slightly shortened life span due to its rigid design and pad composition. This in turn is offset thanks to its fast, aggressive engagement for track use.

    Specifications:

    • Part Number: BM2-HDR4
    • Description: HD/Race Rigid 4 Pad
    • Torque Capacity (ft/lbs.): 345
    • Torque Capacity Over OE: 54%
    • Disc Type: Race Disc
    • Spline Count: 14
    • Spline Size (in.): 1
    • Disc Diameter (in.): 8.4
    • Disc Diameter (mm.): 214
    • Pressure Plate Type: Heavy Duty
    • Product Weight (lbs.): 10.4
    • Kit Contents: 4214022ATGM06B012RB131
    • Warranty (Product Warranty): One (1) Year from Retail Purchase
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    JB Racing - Corporate Logo
    T#:340510
    Part#: WCCLUTCH-E46M3
    Ships in 5 Business Days
    Starting at $ 2,015.99 USD
    Free Shipping
    Starting at $ 2,015.99 USD
    Free Shipping
    The ultimate in a racing flywheel and clutch! This was developed for use in our E36 and E46 World Challenge Touring Cars. The combined weight of the clutch and flywheel is only 11lbs!!!

    This multi-disc (2 or 3 disc setups) offer a minimal flywheel mass (enough to include a factory ring gear for the starter) and a small 5.5" clutch assembly rated to 500ft-lbs. By saving as much weight as possible less energy is used in simply spinning the flywheel/clutch assembly and that means a lot more power and torque is available at the drive wheels. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines and this is among the most advanced and lightest racing clutch kits available for your BMW race car.

    The JB Ultra-Light Performance racing clutch is available in 2-disc or 3-disc setups. A 3-disc setup is less susceptible to heat and will have a higher torque capacity. On our M54-powered 325i Touring Cars (approximately 300hp) we used the 5.5"/140mm 2-disc configuration. The 5.5" clutch was a perfect blend of performance and durability. It wasn't too small to suffer from high temperatures and wasn't too large that it couldn't be slipped (slipping prevents damage to other components). This is a turn-key racing clutch and flywheel kit that you don't have to engineer or spec yourself. This is the same clutch setup we used when winning the 2003 and 2004 Touring Car Championships - the quality and performance is unquestionable. That series also employed standing starts at each race and this clutch setup performed flawlessly with nearly a full season of racing on them before needing a change.

    JB Ultra-Light flywheels include:
  • precision CNC machined aluminum flywheel
  • zero-balanced
  • replaceable hardened steel clutch friction surface
  • Helicoil threaded inserts
  • high-strength grade 10.9 hardware
  • multi-disc Sachs or Powertrain Technology racing clutch with racing pressure plate
  • JB Racing throw-out bearing with custom bobbin
    This is a true racing clutch and will not function as a street-able clutch at all. It behaves as an on/off switch with no slippage allowed. Extreme care must be used when driving on to trailers and around the paddock. But when driven correctly the life span of this clutch is amazing - we could get a full season of racing a 300hp M54 from this clutch setup including standing starts at every race! Replacement clutch components and flywheel rebuilding are available.

    A properly adjusted clutch stop is required for use with this clutch kit.

    Stock Flywheel + Clutch Weight = 45+lbs
    JB Ultra-Light Flywheel & Clutch Weight = 11lbs

    This item fits the following BMWs:
    2001-2006 E46 BMW M3
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