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.

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!

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: 6214122, ATGM06, B012, RB131
• Warranty (Product Warranty): One (1) Year from Retail Purchase

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

MINI R52 R53 Clutch Kit For Solid Flywheel Conversion

Upgrade your Mini's clutch system with the MINI R52 R53 Clutch Kit For Solid Flywheel Conversion. Specifically designed for solid flywheel conversion, this clutch kit ensures optimal performance and durability for your Mini. Say goodbye to clutch issues and enjoy smoother engagements and reliable performance on the road.

• Designed for solid flywheel conversion
• Ensures optimal clutch performance
• Provides smoother engagements
• Enhances reliability on the road
• Made for durability

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.

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: 4214122, ATGM06, B012, RB131
• Warranty (Product Warranty): One (1) Year from Retail Purchase

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.