Clutch Masters 02-21 Subaru WRX/STi .75in Bore Master Cylinder Upgrade Kit - Red

A performance clutch system is one of the most impactful drivetrain upgrades available for any manual transmission vehicle. From street-friendly organic disc kits to heavy-duty ceramic setups built for drag racing and track use, matching the right clutch components to your power level and driving style keeps engagement consistent and power transfer reliable.Popular UpgradesStage 1 and Stage 2 clutch kits with upgraded pressure plates and organic or hybrid friction discs are the most popular choice for street builds making 300 to 500 horsepower. Stage 3 and Stage 4 ceramic or Kevlar disc setups handle the demands of forced induction or high-compression builds. Lightweight aluminum flywheels paired with upgraded clutch kits improve rev response and make gear changes faster on both street and track applications.What clutch stage do I need for my build?Stage 1 clutches are rated for lightly modified street engines up to about 350 horsepower. Stage 2 kits cover 350 to 500 horsepower with...

The clutch master cylinder converts pedal input into hydraulic pressure that actuates the slave cylinder and disengages the clutch. When a master cylinder leaks internally or loses pressure under pedal hold, the clutch will not disengage cleanly, making gear changes difficult or impossible. Replacing a faulty master cylinder restores pedal firmness and precise disengagement immediately.Popular UpgradesOEM-spec replacement master cylinders for Chevrolet, Ford, Mopar, and import platforms are the most common service replacements. Performance billet aluminum master cylinders with larger bore sizes are a popular upgrade for track builds where higher hydraulic pressure and faster response are needed. Remote reservoir setups that relocate the fluid reservoir for cleaner engine bay presentation are also popular on custom builds.What are the symptoms of a failing clutch master cylinder?A failing clutch master cylinder typically causes a soft or gradually sinking clutch pedal, difficulty eng...

Shop Clutch Masters at Black Ops Auto Works for performance clutch kits, FX100, FX250, FX300, FX350, FX400, FX700, FX850, FX1000 clutch systems, single disc clutches, twin disc clutches, multi-disc clutch kits, aluminum flywheels, steel flywheels, hydraulic release bearings, slave cylinders, master cylinder upgrade kits, clutch lines, rebuild kits, friction discs, and manual transmission drivetrain upgrades. This collection is built for street cars, track cars, turbo builds, daily drivers, high-horsepower applications, and enthusiasts who need stronger clutch engagement, better torque capacity, and reliable power transfer. Use this Clutch Masters collection to find the right clutch upgrade by vehicle platform, power level, torque rating, disc material, flywheel type, and driving style. Organic and fiber clutch kits are strong options for street use, ceramic and puck-style clutches support higher heat and power, twin disc and multi-disc systems support more aggressive builds, and lig...

Shop drivetrain parts and accessories at Black Ops Auto Works for differentials, axles, driveshafts, clutch kits, flywheels, flexplates, shifters, transmission components, ring and pinion gears, differential braces, differential bushings, wheel hubs, wheel bearings, U-joints, valve bodies, transmission coolers, drivetrain mounts, and performance driveline upgrades. This collection is built for street cars, drag cars, track builds, trucks, Jeeps, SUVs, high-horsepower Mopar builds, imports, European performance vehicles, and off-road applications that need stronger power delivery, durability, and reliability. Use this Drivetrain collection to find the right upgrade by vehicle platform, drivetrain layout, transmission type, power level, and product category. Differentials and ring and pinion gears support traction and gearing changes, axles and driveshafts help transfer power, clutch kits and flywheels improve manual transmission performance, transmission coolers and valve bodies supp...