Maintain the hydraulic integrity of your driveline with the Clutch Masters O-Ring Seal Kit, specifically designed for 3-post hydraulic release bearings. Over time, heat and friction can degrade internal seals, leading to fluid leaks, pressure loss, and inconsistent clutch engagement. This kit provides the necessary replacement O-rings to refresh your bearing assembly and restore reliable performance.

• Direct replacement seals for Clutch Masters 3-post style bearings
• Engineered to withstand high-temperature hydraulic fluids
• Helps prevent clutch drag and pedal pressure loss caused by internal bypass or external leaks
• Manufacturer Part Number: N017-S-RK

Fits 2012-2016 Scion FR-S (2.0L).

The Clutch Masters Master Cylinder Upgrade Kit is engineered to enhance the hydraulic efficiency and pedal feel of your drivetrain. This kit features a 0.70in bore diameter, providing the necessary fluid displacement to ensure consistent engagement and disengagement—especially critical when running aggressive aftermarket clutch setups that demand more than the factory master cylinder can deliver.

Constructed for durability and finished in a striking red, this master cylinder upgrade replaces the original equipment to provide a more tactile and responsive clutch pedal. It is a direct-fit solution designed to handle the increased pressures of performance driving while maintaining reliable operation.

• Manufacturer Part Number: MC15738-R
• Bore Diameter: 0.70in
• Finish: Red Anodized/Coated
• Application: Improved clutch engagement and pedal travel
• Engineered as a direct performance replacement for OE master cylinders

Fits 2012-2016 Scion FR-S (2.0L).

The Clutch Masters Master Cylinder Upgrade Kit is engineered to replace the restrictive factory unit with a larger 0.70-inch bore cylinder. This upgrade is essential for drivers utilizing heavy-duty aftermarket pressure plates, as the increased bore size provides improved hydraulic displacement and a more consistent, predictable pedal feel for cleaner clutch engagement and disengagement.

• Precision 0.70-inch bore optimizes hydraulic pressure and stroke
• Durable black finish for superior corrosion resistance
• Direct-fit design mounts to factory locations for a straightforward installation
• Eliminates the vague feel often associated with the OE plastic master cylinder
• Manufacturer Part Number: MC15738-BK

Fits 2015-2023 Subaru WRX and WRX STi models.

The Clutch Masters .75in Bore Master Cylinder Upgrade Kit (MC15020-R) is engineered to solve the vague pedal feel and hydraulic strain often encountered when running heavy-duty aftermarket pressure plates. By increasing the bore diameter to .75 inches, this kit provides superior hydraulic leverage and more consistent fluid displacement compared to the factory unit, ensuring a crisp, predictable clutch engagement point.

• Precision-machined .75in bore for improved pedal feedback and displacement
• Anodized red finish for superior corrosion resistance and engine bay aesthetics
• Direct-fit design engineered to integrate with factory mounting points
• Includes all necessary hardware for a complete installation
• Designed for high-performance street and track applications
• Manufacturer Part Number: MC15020-R

Fits 2015+ Subaru WRX and STI models.

The Clutch Masters .75in Bore Master Cylinder Upgrade Kit (MC15020-BK) is engineered to solve the common issues of vague pedal feel and inconsistent engagement found in high-performance clutch setups. By increasing the bore size to 0.75 inches, this master cylinder provides the necessary fluid volume and pressure to properly actuate heavy-duty pressure plates, resulting in a more tactile and predictable clutch pedal travel.

Constructed with a durable black finish to resist corrosion and maintain a clean engine bay aesthetic, this kit replaces the factory hydraulic unit and bolts directly to the OEM mounting points. It is an essential upgrade for Subaru owners running aftermarket multi-disc or high-clamping force clutches who require precise control and reliability.

• Manufacturer Part Number: MC15020-BK
• Bore Diameter: 0.75 inches
• Finish: Black
• Compatible with 2015+ Subaru WRX and STI
• Includes all necessary hardware for installation

Fits 2002-2021 Subaru WRX and STi models.

The Clutch Masters Master Cylinder Upgrade Kit (MC15017-V) provides a significant improvement over the factory hydraulic system by utilizing a larger 0.75-inch bore. This increase in bore size allows for more efficient fluid displacement, which is essential when running high-performance pressure plates that require more volume to achieve clean clutch disengagement. The result is a more consistent pedal feel and a more predictable engagement point during aggressive shifting.

Built for durability and precision, this kit features a striking violet anodized finish and is designed to bolt into the factory mounting position. It addresses common issues like soft pedal feel or incomplete disengagement often found in modified Subaru drivetrains.

• Manufacturer Part Number: MC15017-V
• Bore Diameter: 0.75 inches
• Finish: Violet Anodized
• Application: Replaces factory master cylinder for improved hydraulic leverage
• Compatible with 2002-2021 Subaru WRX and WRX STi chassis

Fits 2004-2014 Subaru WRX and WRX STi models.

The Clutch Masters 0.75in Bore Master Cylinder Upgrade Kit is designed to improve clutch engagement and pedal feel on 2004-2014 Subaru WRX and STi platforms. Replacing the factory unit with a larger 0.75-inch bore allows for more consistent modulation and a firmer, more communicative pedal. This upgrade is specifically beneficial when running high-clamp load aftermarket clutch kits that often require more hydraulic volume than the stock cylinder provides.

This kit features a red anodized finish for long-lasting corrosion resistance and a custom appearance in the engine bay. It is engineered to install into the factory mounting position using the included hardware for a straightforward upgrade process.

• Precision-machined 0.75-inch bore for improved hydraulic performance
• Red anodized finish for durability and aesthetics
• Includes all necessary installation hardware
• Direct-fit for GD and GR chassis Subaru WRX and STi
• Manufacturer Part Number: MC15017-R

Fits 2002-2021 Subaru WRX and STI models.

The Clutch Masters Master Cylinder Upgrade Kit (MC15017-BK) is engineered to enhance clutch pedal feel and hydraulic efficiency, particularly on vehicles equipped with heavy-duty aftermarket pressure plates. By utilizing a .75in bore size, this kit provides the necessary displacement to ensure clean clutch release and consistent engagement, overcoming the limitations of the factory master cylinder in high-performance applications.

• Bore Diameter: .75in
• Finish: Durable Black Anodized
• Designed for improved pedal modulation and response
• Compatible with 2002-2021 Subaru WRX/STI
• Includes installation hardware and fittings
• Manufacturer Part Number: MC15017-BK

Designed for universal Honda and Acura hydraulic clutch applications, this Clutch Masters Master Cylinder Upgrade Kit optimizes hydraulic fluid flow and pedal feedback. It is an essential upgrade for vehicles equipped with heavy-duty performance clutches where the factory master cylinder may lack the displacement or durability required for consistent engagement.

This kit features a .75in bore to provide a more precise engagement point and a firmer, more communicative pedal feel. The cylinder is finished in black for a clean, professional appearance in the engine bay and improved resistance to the elements.

• Manufacturer Part Number: MC08UN-9BK
• Bore Diameter: .75in
• Application: Fits universal Honda and Acura hydraulic systems
• Finish: Black
• Enhances fluid displacement for high-pressure pressure plate applications
• Replaces or upgrades restrictive OE master cylinders

Fits 2017-2021 Honda Civic Type R (2.0L).

The Clutch Masters Master Cylinder Upgrade Kit (MC08520-R) provides a robust, high-performance replacement for the factory clutch master cylinder. Designed to withstand the increased pressures of performance clutches, this kit features a larger 0.75-inch bore that improves hydraulic displacement and provides a more consistent, communicative pedal feel.

• Precision-machined 0.75-inch bore for increased fluid volume
• Durable red anodized finish for superior corrosion resistance and engine bay aesthetics
• Direct-fit design engineered specifically for the 2.0L Turbo FK8 chassis
• Replaces the plastic OE cylinder with a durable, high-pressure alternative
• Manufacturer Part Number: MC08520-R

Fits 2017-2021 Honda Civic Type R (2.0L).

The Clutch Masters Master Cylinder Upgrade Kit (MC08520-BK) is designed to replace the restrictive factory hydraulic unit on the FK8 chassis. By utilizing a larger .75in bore, this kit improves fluid displacement and provides a more direct, consistent pedal feel—eliminating the vague engagement often found with the OE plastic master cylinder. This upgrade is essential for drivers requiring precise clutch control and durability during high-performance use or track environments.

• Bore Size: .75in
• Finish: Black Anodized
• Application: 2017-2021 Honda Civic Type R (FK8)
• Engine Compatibility: 2.0L Turbo
• Manufacturer Part Number: MC08520-BK

Fits 2022-2024 Honda Civic 1.5L Turbo and 2023-2024 Honda Civic Type R 2.0L models equipped with a 6-speed manual transmission.

The Clutch Masters MC08222-R is a performance-oriented clutch master cylinder designed to deliver more consistent hydraulic pressure and a more positive pedal feel compared to the factory unit. This upgrade is especially beneficial for vehicles running aftermarket clutch kits that require higher clamp loads, ensuring the hydraulic system can keep up with demanding driving conditions.

• Manufacturer Part Number: MC08222-R
• Finish: Anodized Red
• Compatibility: 6-Speed Manual Transmissions
• Direct fitment for 11th Gen Civic (1.5L) and FL5 Type R (2.0L)
• Engine Fitment: 1.5L Turbo / 2.0L Turbo

Fits 2022-2024 Honda Civic 1.5L Turbo and 2023-2024 Honda Civic Type R 2.0L with 6-speed manual transmission.

The Clutch Masters MC08222-BK is a high-performance clutch master cylinder engineered to improve hydraulic reliability and pedal consistency. As a direct-fit replacement for the factory unit, it is designed specifically for the 11th generation Honda Civic and FL5 Type R platforms. This upgrade is ideal for enthusiasts who have installed performance clutch kits and require a more robust hydraulic system to handle increased line pressures without compromising pedal feel.

• Direct-fit for 6-speed manual transmission models
• Durable black finish for professional appearance and corrosion resistance
• Maintains consistent hydraulic pressure under performance conditions
• Engineered to withstand the demands of heavy-duty aftermarket clutch kits
• Manufacturer Part Number: MC08222-BK

Fits 2017-2021 Honda Civic EX and Si (1.5L Turbo).

The Clutch Masters .75in Bore Master Cylinder Upgrade Kit is engineered to resolve the limitations of the factory clutch hydraulic system. In the 10th Gen Civic 1.5L, the restrictive stock master cylinder can result in a vague pedal feel or inconsistent engagement, particularly when paired with high-performance aftermarket clutches. This kit replaces the OE unit with a larger-bore alternative that provides increased fluid displacement and superior pedal feedback.

Constructed for durability and precision, the master cylinder features a violet anodized finish and includes the specific hardware required for a clean installation. This upgrade is essential for enthusiasts demanding consistent shifting performance and a more tactile clutch response during spirited driving or track sessions.

• Manufacturer Part Number: MC08150-V
• Bore Size: .75 inch
• Finish: Violet Anodized
• Application: Direct-fit upgrade for 1.5L Turbo 6-speed manual platforms
• Compatible with factory clutch lines or stainless steel upgrades

Fits 2017-2021 Honda Civic EX and Si (1.5L Turbo).

Replace the factory plastic master cylinder in your 10th Gen Civic with this robust Clutch Masters Master Cylinder Upgrade Kit. Designed to handle the increased pressure requirements of performance clutches, this kit features a .75-inch bore that provides more consistent fluid displacement and improved pedal feel compared to the original equipment. It is a critical solution for drivers who have experienced the common failure of the OE plastic unit when paired with heavy-duty pressure plates.

• Direct-replacement upgrade for the failure-prone factory plastic cylinder
• Large .75-inch bore size for superior hydraulic volume and pedal control
• Red finish for a custom look and corrosion resistance
• Engineered specifically for the 1.5L Turbo hydraulic system
• Manufacturer Part Number: MC08150-R

Fits 2017-2021 Honda Civic EX and Si models (1.5L).

The Clutch Masters Master Cylinder Upgrade Kit (MC08150-BK) is engineered to solve the common failure points of the factory plastic master cylinder found in 10th Generation Civics. When upgrading to high-performance aftermarket clutches with heavier pressure plates, the OE hydraulic system can struggle to maintain pressure, often leading to leaks or a vague pedal feel. This kit utilizes a .75-inch bore to provide a more consistent hydraulic stroke and improved pedal response.

Constructed for long-term durability, the master cylinder features a robust build with a black finish for a clean, professional appearance in the engine bay. This is a critical upgrade for Civic owners looking to ensure drivetrain reliability during spirited driving or track applications.

• Manufacturer Part Number: MC08150-BK
• Bore Diameter: .75 inch
• Finish: Black
• Body Material: High-strength construction replaces OE plastic
• Compatibility: Direct-fit for 2017-2021 Honda Civic EX/Si (1.5L Turbo)

Facilitate a high-performance engine swap by mating a Honda K-Series (K20/K24) engine to a Subaru EJ 5-speed or 6-speed transmission. This Clutch Masters engine adapter plate is engineered for precision alignment, ensuring the crankshaft and input shaft maintain proper geometry for reliable power transfer and drivetrain longevity.

This kit is designed to utilize the factory Honda starter, simplifying the electrical side of the swap and allowing for the use of a RWD K-Series wiring harness with minimal modification. To maintain a clean install and protect the bellhousing, the kit includes a dedicated cover plate to seal the original Subaru starter port.

• Fits: Honda K20 and K24 engines
• Compatible Transmissions: Subaru EJ-series 5-speed and 6-speed manual transmissions
• Retains factory Honda starter for simplified wiring
• Includes starter hole cover plate for the Subaru transmission
• Precision machined for exact fitment
• Manufacturer Part Number: K721-EAP

The Clutch Masters Universal Replacement Steel Flywheel Insert, part number H3-12/D-250, is an essential component for maintaining and rebuilding modular flywheel assemblies. This steel friction surface allows enthusiasts to restore clutch performance without the need to replace the entire flywheel unit when the original surface becomes worn, heat-scored, or glazed.

• Manufacturer Part Number: H3-12/D-250
• Material: High-strength steel construction for consistent friction and heat dissipation
• Application: Designed as a replaceable friction plate for compatible Clutch Masters modular flywheels
• Function: Restores a flat, true mating surface for the clutch disc to ensure optimal engagement and torque transfer
• Hardware: Engineered to meet specific tolerances for secure mounting to the flywheel body

Fits select 2002-2024 Acura and Honda models utilizing a K-series engine to S2000 transmission conversion.

This Clutch Masters custom flywheel is engineered for high-performance builds requiring a K-series engine mated to an S2000 drivetrain. Precision CNC-machined from 1045 steel billet cores, this flywheel provides the durability and thermal stability necessary for aggressive street or track use. Each unit is zero-balanced after machining to ensure true rotation and eliminate drivetrain vibration. To protect against corrosion, the steel core is finished with a black oxide coating, providing a professional look and long-term rust prevention.

Designed to improve engine response, this flywheel enables quicker revs and helps reduce lag in turbocharged applications. Every unit is hand-assembled and inspected by Clutch Masters technicians to maintain strict tolerances before being cleared for pairing with FX-series single disc or twin disc clutch systems.

• SFI 1.2 Certified for competitive motorsports use
• CNC machined from high-grade 1045 billet steel
• Black oxide coated for superior rust prevention and durability
• Zero balanced to ensure 100% true rotation
• Compatible with FX100-FX500 single disc and twin disc kits
• Manufacturer Part Number: FW-K2F-SF

Fits 1988-2001 Honda Civic, Civic del Sol, CRX, and Prelude models configured for H22 engine swaps using a B-Series transmission (H2B).

Designed and manufactured in the USA, the Clutch Masters FW-H2B-AL aluminum flywheel is precision-engineered for H2B conversion projects. By significantly reducing rotational mass, this flywheel allows the engine to rev more freely, improving throttle response and reducing lag in turbocharged setups. Each flywheel is CNC machined from 6061 aluminum billet and zero-balanced to ensure it spins 100% true, eliminating vibration at high RPM.

To ensure long-term durability, the flywheel features a Type 3 hard-anodized finish and a replaceable 1045 steel friction surface. This modular design eliminates the need for resurfacing; the steel insert can be replaced during clutch service to provide a fresh mating surface. Every unit is SFI 1.2 certified, making it suitable for both street performance and competitive motorsport use.

• CNC machined from high-grade 6061 aluminum billet
• Replaceable 1045 steel friction insert saves time on resurfacing
• Type 3 hard-anodized for maximum wear protection
• Zero-balanced for smooth, high-RPM operation
• SFI 1.2 Certified for motorsport safety standards
• Designed specifically for H22 engine to B-Series transmission swaps
• Manufacturer Part Number: FW-H2B-AL

Fits 2018-2021 Subaru WRX Base, Limited, and Premium models (2.0L) starting from mid-2018 production (VIN J*806877 and later).

This Clutch Masters steel flywheel (FW-915-SF) is precision-engineered and manufactured in the USA to provide a more responsive driving experience. Machined from 1045 steel billet cores on Haas CNC lathes, this flywheel reduces rotational inertia to improve acceleration and minimize turbo lag. Each unit is zero-balanced to ensure smooth, vibration-free operation and is black oxide coated for long-term corrosion resistance.

• CNC machined from 1045 steel billet for high-strength durability
• Zero balanced to ensure 100% true rotation and drivetrain harmony
• Black oxide finish for superior rust prevention
• SFI 1.2 Certified for use in sanctioned motorsports
• Designed to work with Clutch Masters FX100-FX500 single disc or twin disc kits
• Manufacturer Part Number: FW-915-SF

Vehicle Fitment

Fits 1998-2002 Toyota Altezza RS200 6-speed models (2.0L 3SGE).

Designed and manufactured in the USA, the Clutch Masters lightweight aluminum flywheel is engineered to reduce rotational mass, resulting in significantly quicker throttle response and faster turbo spool by reducing lag. Each flywheel is precision CAD-designed and CNC-machined in-house from high-grade 6061 billet aluminum on Haas CNC lathes. To ensure smooth operation at high RPM, every unit is zero-balanced to maintain strict tolerances and spin 100% true.

The aluminum core features a Type 3 hard-anodized finish for superior durability and protection. For longevity and ease of maintenance, Clutch Masters utilizes a replaceable steel friction surface insert, allowing you to refresh the flywheel without the need for traditional resurfacing. This flywheel is an ideal upgrade for street or track use and is ready to be paired with FX100-FX500 single-disc or twin-disc clutch kits.

• Manufacturer Part Number: FW-825-AL
• Material: 6061 Billet Aluminum with Replaceable Steel Friction Insert
• Finish: Type 3 Hard Anodized
• Safety: SFI 1.2 Certified for motorsport use
• Weight reduction for improved engine acceleration and reduced drivetrain loss
• Precision balanced to ensure vibration-free performance

Fits 2006-2012 Lexus IS250 Base and IS250 C models (2.5L).

The Clutch Masters FW-805-AL aluminum flywheel is designed and manufactured in the USA to provide a significant reduction in rotational mass compared to the factory unit. Precision CNC machined from 6061 billet aluminum cores, this flywheel allows the engine to rev more freely, improving throttle response and reducing turbo lag. Each unit is zero-balanced to ensure it is evenly weighted on all sides and spins true at high RPMs.

Designed for long-term performance, these flywheels feature a replaceable 1045 steel friction surface, which eliminates the need for resurfacing and extends the life of the component. The aluminum body is treated with Type 3 Hard Anodizing for maximum durability and protection. This flywheel is SFI 1.2 Certified, making it suitable for both street use and competitive motorsports.

• Manufacturer Part Number: FW-805-AL
• Material: 6061 Aluminum Billet
• Friction Surface: Replaceable 1045 Steel Insert
• Finish: Type 3 Hard Anodized
• Certification: SFI 1.2 Spec
• Manufacturing: CNC machined in the USA
• Compatibility: Compatible with FX100-FX500 single disc and twin disc kits

Fits 2015-2019 BMW M3 and M4 Base models (3.0L). This Clutch Masters lightweight aluminum flywheel is precision-engineered to reduce rotational mass, allowing for quicker engine revs and significantly reduced turbo lag. CNC machined in the USA from 6061 billet aluminum, this flywheel replaces the heavy factory unit to improve drivetrain response without sacrificing long-term reliability.

Each flywheel features a replaceable 1045 steel friction insert, which allows the unit to be serviced without resurfacing the aluminum body. To ensure vibration-free performance at high RPM, every unit is zero-balanced and finished with Type 3 Hard Anodizing for maximum durability. This flywheel is designed for versatility, mounting directly to the crank and compatible with the OEM clutch kit, as well as Clutch Masters FX100-FX500 single-disc or twin-disc upgrades.

• CNC machined from high-grade 6061 billet aluminum
• Replaceable 1045 steel friction surface eliminates resurfacing
• Type 3 Hard Anodized for superior wear resistance
• SFI Certified for safety and track compliance
• Zero-balanced to ensure 100% true rotation
• Compatible with OEM and Clutch Masters FX-series clutch kits
• Manufacturer Part Number: FW-795-AL

Fits select 1992-2004 Volkswagen Corrado, Golf, Jetta, and Passat (2.8L).

This Clutch Masters flywheel is precision-engineered and manufactured in the USA to provide a significant performance upgrade over heavy factory components. Designed using CAD software and CNC machined from a 1045 steel billet core, this flywheel is built for high-performance street use and competitive motorsports. By reducing rotational mass, it allows the 2.8L engine to rev more freely and helps minimize turbo lag in forced induction applications.

Each unit is zero-balanced by a Clutch Master craftsman to ensure perfectly even weighting and vibration-free rotation at high RPMs. The steel construction features a black oxide coating for superior rust prevention and a clean, professional finish. This flywheel is fully compatible with Clutch Masters FX100 through FX500 single disc clutch kits as well as various twin disc systems.

• Manufacturer Part Number: FW-788-SF
• SFI 1.2 Certified for motorsports use
• Precision CNC machined from 1045 steel billet
• Zero-balanced to ensure perfectly true rotation
• Black oxide finish for long-term corrosion resistance
• Designed and manufactured in the USA

Fits 2014-2018 Mazda 3 models (2.5L).

The Clutch Masters FW-775-AL aluminum flywheel is designed to significantly reduce rotational mass compared to heavy factory components, resulting in quicker throttle response and faster engine revs. Each flywheel is CAD-designed and precision CNC-machined in the USA from 6061 aluminum billet. To ensure smooth operation across the entire RPM range, every unit is zero-balanced to eliminate vibration and maintain 100% trueness.

This lightweight flywheel features a replaceable steel friction surface, which provides the necessary heat capacity for high-performance use while allowing for easy replacement during clutch service without needing to resurface the entire flywheel. The aluminum core is treated with a Type 3 hard anodized finish for maximum durability and protection against wear. SFI 1.2 certified for motorsport use, this flywheel is ready for pairing with Clutch Masters FX100-FX500 single disc or twin disc clutch systems.

• Material: 6061 Aluminum Billet
• Certification: SFI 1.2 Certified
• Finish: Type 3 Hard Anodized
• Friction Surface: Replaceable Steel Insert
• Manufacturing: CNC Machined and Zero Balanced
• Performance: Reduced rotational inertia for improved acceleration
• Manufacturer Part Number: FW-775-AL

Fits 1994-2005 Mazda Miata (1.8L) including Base, LS, Mazdaspeed, and special editions.

This Clutch Masters aluminum flywheel is engineered to significantly reduce rotating mass, delivering sharper throttle response and faster acceleration for your 1.8L Miata. Each unit is precision CNC machined in the USA from a 6061 aluminum billet core. To ensure smooth performance and drivetrain longevity, the flywheel is zero balanced by a specialist to eliminate vibrations and ensure it spins 100% true.

Built for the rigors of performance driving, these flywheels feature a Type 3 Hard Anodized finish for maximum durability. They are designed to be a direct fitment and are fully compatible with Clutch Masters FX100 through FX500 single disc clutch kits, as well as their twin disc options. Every flywheel undergoes rigorous quality control for tolerances and imperfections before leaving the workshop.

• Manufacturer Part Number: FW-746-AL
• Material: 6061 Billet Aluminum
• Finish: Type 3 Hard Anodized
• Certification: SFI 1.2 Certified for motorsport use
• Manufacturing: Precision CNC machined and zero balanced in the USA

Fits select 2013-2020 Scion FR-S, Subaru BRZ, and Toyota 86 (2.0L).

Engineered for drivers seeking quicker revs and improved throttle response, the Clutch Masters FW-738-SF steel flywheel is precision-manufactured in the USA. Each flywheel starts as a 1045 billet steel core, which is CAD-designed and CNC-machined in-house to exact tolerances. Note: This flywheel is specifically designed to work exclusively with Clutch Masters FX-series single disc (FX100-FX500) or twin disc clutch kits and is not compatible with OEM clutches.

To ensure smooth operation and drivetrain longevity, every unit is zero-balanced before shipping. The 1045 steel construction provides excellent heat capacity and durability for both high-performance street use and track applications, finished with a black oxide coating for superior rust prevention. All Clutch Masters flywheels are SFI 1.2 Certified, meeting strict safety standards for competitive motorsports.

• Material: 1045 Billet Steel Core
• Finish: Corrosion-resistant Black Oxide Coating
• Certification: SFI 1.2 Certified
• Compatibility: Requires Clutch Masters FX-series or twin disc clutch (Not for use with OEM clutch)
• Manufacturing: CNC machined and zero-balanced in the USA
• MPN: FW-738-SF

Fits 2004-2021 Subaru WRX STI and 2006-2009 Legacy GT spec.B (2.5L) equipped with 6-speed manual transmissions.

This Clutch Masters steel flywheel is engineered to replace the heavy factory unit, offering a significant reduction in rotational mass to improve throttle response and reduce turbo lag. Designed and manufactured in the USA, each flywheel is CAD-engineered and precision Haas CNC-machined from a 1045 steel billet core. This construction provides the durability required for high-performance street and track use while maintaining excellent heat dissipation characteristics.

To ensure smooth operation and engine longevity, every flywheel is zero-balanced to eliminate vibration. The steel core is finished with a black oxide coating for superior rust prevention. This component is SFI 1.2 Certified, meeting strict safety standards for competitive motorsports. It is designed to pair seamlessly with Clutch Masters FX100 through FX500 single disc kits or their twin-disc clutch options.

• CNC-machined from 1045 billet steel for maximum strength
• Zero-balanced to ensure 100% true rotation
• Black oxide coated for long-term corrosion resistance
• SFI 1.2 Certified for motorsport safety compliance
• Reduces rotational inertia for quicker engine revs and reduced turbo lag
• Manufacturer Part Number: FW-721-SF

Fits 1986-1993 Toyota Supra Base and Turbo models. This Clutch Masters steel flywheel is precision-engineered to improve engine response and reduce turbo lag by minimizing rotational mass compared to heavy factory units. Designed for high-performance applications, it provides the durability required for both spirited street driving and competitive motorsports.

Each flywheel is CNC machined in-house from a 1045 steel billet core and zero-balanced to ensure it spins true across the entire RPM range. The surface is treated with a black oxide coating for superior rust prevention. This unit is designed for versatility, allowing for installation with OEM clutch kits, Clutch Masters FX100-FX500 single disc kits, or various twin disc options.

• Manufacturer Part Number: FW-717-2SF
• Material: 1045 Billet Steel
• Finish: Black Oxide Coated
• Certification: SFI 1.2 Certified for motorsports use
• Manufacturing: CNC machined and zero-balanced
• Compatibility: 1JZ-equipped 1986-1993 Supra chassis