The factory BMW S55 dual-mass flywheel is engineered with comfort in mind, catering to the luxury-oriented expectations of the brand’s driving experience. Its design focuses on dampening drivetrain vibrations, smoothing out gear transitions, and minimizing harshness during operation. However, this refinement costs valuable performance. The dual-mass flywheel adds a substantial 26.5 lbs of rotational mass to the drivetrain, which significantly hinders throttle response and makes rev-matching feel sluggish and disconnected. Moreover, dual-mass flywheels are notorious for being a weak link in modified or high-performance builds and can prove costly to replace when they inevitably fail.

Our Single-Mass Lightweight Flywheel Conversion addresses all of these shortcomings with a purpose-built, lightweight, single-mass design that prioritizes performance. Weighing in at only 18.5 lbs., this design significantly reduces rotational mass, allowing your S55 to achieve its true motorsport potential!

Features & Benefits:

Precision machined from 4140 HT heat-treated chromoly steel for exceptional toughness, even wear properties, and increased durability.
Material quality promotes even wear across the entire friction surface, prolonging component lifespan.
Heat treated to HRC 28-32, tempered to relieve stress and improve dimensional stability.
Hardness improves component wear characteristics.
Black oxide coated for corrosion resistance on non-friction surfaces.
Precision balanced to exceed OEM specification (G16 spec to 175g-mm).
SFI 1.1 certified to ensure safe operation under extreme operating conditions.
Specifically designed to work with S55 OE-architecture clutches.
Optimized step height maximizes clutch clamp load and offers a prolonged service life.
Performance:

10 lbs. lighter than the factory BMW flywheel!
OEM Dual-Mass: 26.5 lbs.
Turner Motorsport Single-Mass: 18.5 lbs.
Faster revs
Improved throttle response and acceleration
Allows for a more engaging driving experience and delivers a feeling of direct connection
Installation:

Flywheel Hardware: For added peace of mind, apply Blue or Orange Loctite when installing factory flywheel bolts that do not come with pre-applied threadlocker.

BMW E30 M20 Clutch And Flywheel Kit - I/IS from Turner Motorsport offers a premium upgrade for naturally aspirated M20 engines. This comprehensive kit includes a lightweight single-mass flywheel and a Sachs clutch kit, providing a significant performance boost and refreshing the driving experience of early and late-model E30s.

• Lightweight Single-Mass Flywheel: Enhances throttle response and frees up lost horsepower by reducing rotating mass. Provides a perfect balance between lightweight performance and durability.
• Sachs OE Replacement Clutch Kit: Includes clutch disc, pressure plate, throw-out bearing, and pilot bearing, designed for reliable performance and smooth operation.
• Improved Driving Experience: Refreshes the clutch pedal feel and driving dynamics of the M20 engine, ideal for both early and late model E30s.
• Quality and Fitment: Tested and approved by Turner Motorsport for optimal performance and confirmed fitment on various E30 models.
• Additional Components: Recommended transmission seals, fluid, and mounting hardware available separately for a complete service.

BMW E46 M3 Stage 2 Daily Clutch Kit is designed to deliver impressive power handling and daily drivability for modified E46 M3s. Turner Motorsport offers this high-performance clutch kit, engineered to withstand increased horsepower and torque while maintaining a near-stock pedal feel. Featuring a heavy-duty pressure plate and high metal-content organic disc, this Stage 2 clutch kit is ideal for street driving, moderate racing, and daily performance needs.

With an enhanced clamp load that doesn’t compromise pedal pressure, this clutch kit is conservatively rated to handle up to 340 lbs/ft of torque. Its solid-hub center design ensures smooth compatibility with the OE dual-mass flywheel, making it a reliable choice for E46 M3 enthusiasts looking to upgrade their clutch system for increased durability and strength.

• Heavy-Duty Pressure Plate: Increased clamp load for enhanced torque capacity with minimal change in pedal pressure
• High Metal-Content Organic Disc: Boosts friction coefficient and rotational strength, rated for up to 12,000 RPM burst point
• Daily Drivability: Maintains a near-stock feel, perfect for street and moderate race applications
• Solid-Hub Center Design: Works seamlessly with the OE dual-mass flywheel for reliable performance
• Torque Handling: Conservatively rated to manage up to 340 lbs/ft of torque for added performance

Recommended for daily, street, and moderate race use.

This kit from Valeo is a simple way to easily convert your stock dual mass flywheel clutch system to a single mass system.

Dual mass flywheels allow for fluid-feeling clutch engagements and offer a more luxurious feel than single-mass flywheels. However, with these benefits come significant drawbacks. Why convert from a dual-mass flywheel to a single-mass flywheel?

Cost: Dual-mass flywheels are expensive, with the cost of replacement often times being double or triple than that of converting to a single-mass flywheel.
Serviceability: Single-mass flywheels can be resurfaced, eliminating the need to replace with the next clutch service. - something that is not recommended with dual-mass flywheels, as they contain a rubber section that is more failure-prone in high mileage application.
Simplicity: Single-mass flywheels lack the complexity of dual-mass flywheels, making them inherently more reliable. Dual-mass flywheels contain a rubber damper or hub that will, like all rubber components, wear out with time.
Pedal Feel: Many enthusiasts prefer to eliminate BMW's "Self Adjusting Clutch", which has been known to provide an unpredictable, inconsistent engagement point.
Driveability: Valeo's conversion kit has been designed to maintain nearly identical clutch and flywheel weight, ideal for keeping the clutch quiet and easy to drive.
Kit contents:

Single-mass flywheel
Non-Self Adjusting Clutch and pressure plate
Throw out bearing
Pressure plate bolts
Flywheel bolts
Clutch alignment tool

This clutch package is designed for high HP vehicles desiring a start performance similar to O.E. The pressure plate is Race Engineered (SS) and SFI approved with significant load increase over stage 1,2 pressure plates (+600-800 lbs.). Expect a pedal effort increase of 20%-25%. Discs are assembled with heat-treated wear resistant hubs; drive plates and springs for high load transfer and dependable operation. The sprung centers on the disc in conjunction with the marcel fin between the linings create a dual dampening effect that simulates O.E. start performance. A Performance Organic friction material with a high metal content increases torque and RPM capability and maintains low operating temperatures which reduces wear and glazing.

Stage 3 Daily Clutch Kits:

Recommended usages are daily, spirited street and occasional track
Conservatively rated to hold 500lbs/ft of torque
Featuring a solid-hub center section for use with an OE dual-mass flywheel

BMW E46 E39 Z3 Stage 2 Endurance Clutch Kit is designed for drivers who demand both precision and durability in high-performance scenarios. Developed by Turner Motorsport, this endurance clutch kit delivers seamless power transfer and quick shifts, making it ideal for both daily driving and intense racing environments. It features an SFI-approved single mass flywheel, which is highly recommended for optimal performance.

• Engineered for durability in daily and street use with a focus on rally and endurance racing
• Rated conservatively to handle up to 385 lbs/ft of torque, providing confidence in high-power applications
• Precision-balanced pressure plate ensures vibration-free operation even at high RPM
• Positive disengagement and fast shifts due to altered pressure plate fulcrum, perfect for competitive driving
• Dual-damped disc design delivers smooth, controlled acceleration through corners, enhancing driving dynamics
• Hybrid friction material with Feramic (Sintered Iron) on the flywheel side and high-metal organic lining on the pressure plate side offers a positive yet buffered engagement
• High graphite content in Feramic facings adds to smoothness and longevity
• Solid-hub center section compatible with OE dual-mass flywheel

This clutch kit from Valeo includes a new friction disc, pressure plate, and throwout/release bearing. Valeo is an OE BMW supplier - save money and buy quality parts by buying those parts in a different box!

For vehicles with an SMG transmission.