ACT Clutch Kits, Mod-Twin Clutches & XACT Flywheels
Build a matched manual-transmission drivetrain with ACT performance clutch kits, replacement clutch discs, pressure plates, XACT flywheels and installation components. Black Ops Auto Works carries Advanced Clutch Technology parts for street cars, track builds and competition applications, including vehicle-specific single-disc kits and Mod-Twin multi-disc systems. Shop by exact ACT part number and your complete engine and transmission combination to find the right configuration for your build.
Choose Your Part
Start with the engine’s expected torque output and how the car will be driven. A daily driver needs predictable engagement, while a dedicated race car may prioritize fast shifts and repeated high-load operation. Compare the exact kit’s published torque capacity, pressure plate, friction material and hub design. ACT engine-torque ratings are measured at the engine; they should not be treated as interchangeable with wheel-torque or horsepower figures. Leave room for planned engine upgrades when selecting a suitable assembly.
Performance Street, sprung race and rigid race discs
ACT Performance Street configurations use organic friction material for street-oriented engagement. A sprung hub helps damp torsional vibration through the drivetrain. Puck-style race discs and rigid-hub designs offer different engagement characteristics and can transmit more vibration or drivetrain noise. A six-pad or four-pad disc is not simply another street-clutch stage: match the exact friction design and intended use instead of choosing by an informal stage number.
Heavy Duty and Xtreme pressure plates provide different clamp-load configurations. Pedal effort and holding capacity depend on the application and complete kit, so compare the specific part numbers rather than assuming every HD or XT kit has the same rating.
Single-disc kits and Mod-Twin 225 systems
Browse single-disc clutch kits for a conventional replacement assembly, or compare multi-disc clutch kits for applications requiring a different torque and friction-area package. ACT Mod-Twin 225 systems combine two friction discs with their matching flywheel and related components. Street and race versions, sprung and rigid hubs, and Heavy Duty and Xtreme configurations are distinct products. Replacement friction parts must match the exact Mod-Twin system; a similar-looking disc or rebuild kit does not establish compatibility.
XACT Streetlite and Prolite flywheels
ACT XACT flywheels are available in application-specific Streetlite and Prolite configurations. Flywheel mass and construction influence engine response and drivability, but weight varies by part number. Confirm the crankshaft bolt pattern, ring gear, clutch diameter and intended friction surface before selecting a flywheel. Some clutch kits include a flywheel, some require a particular ACT flywheel, and others work with an approved original-equipment unit. Read the exact kit’s included-items and flywheel requirements before ordering.
Replacement discs, pressure plates and installation parts
Maintain a matched assembly with ACT clutch discs, pressure plates, release bearings, pilot bearings, pilot bushings, Monoloc collars, counterweights, alignment tools and rebuild components. A pilot bearing or bushing supports the transmission input shaft; a release bearing operates against the clutch release mechanism. A Monoloc collar and a pilot-bearing seal serve separate functions. Select these components by exact manufacturer number and assembly compatibility rather than treating them as interchangeable bearings.
Verify engine, gearbox and production-date details
Year, make and model are the starting point. Also confirm the engine code, manual transmission, input-shaft spline count and diameter, clutch diameter, crank bolt pattern and release system. Engine swaps and transmission conversions require a complete component match. Some BMW N54/N55 applications have production-month and six-bolt versus eight-bolt crankshaft splits; a broad model-year range cannot resolve that difference. Toyota GR Supra manual-transmission kits also have specific engine and model-year limits. Use the product’s detailed application notes alongside the current ACT catalog.
Frequently Asked Questions
Which ACT clutch is best for a daily driver?
Compare an application-correct Performance Street configuration with the engine torque you expect to produce. Review pedal effort, organic friction material, hub design and the exact kit’s torque rating. A race disc may introduce engagement or noise characteristics that do not suit your daily use.
Does every ACT clutch kit include a flywheel?
No. Included components and approved flywheels vary by kit. Check the exact manufacturer part number for an included flywheel, a required ACT flywheel or compatibility with a specified original-equipment flywheel.
Can I choose a clutch from horsepower alone?
No. Clutch selection also requires engine torque, intended use, friction material, transmission and application details. A published engine-torque rating is different from wheel torque and is not a horsepower rating.
Are pilot bearings and release bearings the same part?
No. Pilot bearings or bushings support the transmission input shaft, while release bearings operate the clutch release mechanism. Match each to its specified assembly. Collars and seals are additional components with separate part numbers.
Can I replace a disc without changing the pressure plate?
Only when the disc, pressure plate and flywheel are an approved match and the retained components meet the manufacturer’s inspection and service requirements. Disc diameter and spline fit alone do not prove the assembly is compatible.
Do ACT street clutches need break-in?
Follow the current ACT instructions for the exact clutch and friction material. Complete the specified break-in and release-system checks before full-load operation, launches or track use.
Explore ACT Clutch Components
Compare the exact ACT kit and its replacement components above, or browse the complete clutch components collection to assemble the parts your manual-transmission build requires.
