All Modified and Performance street discs are certified as meeting SFI® Specification 1.1 and are legal in all racing organizations that require SFI® Certification.
PREMIUM ORGANIC MATERIAL
Performance street discs feature a premium organic friction material, tested to provide better heat capacity and faster recovery from overheating.
Disc components are manufactured using precision stampings from dedicated tooling, allowing the highest quality and consistency.
ACT spring retainers are designed with wrap-around spring windows to provide additional support and reduce stress concentrations, which eliminate common causes of failure. These improved retainers are found on most ACT Modified and Performance street discs.
HEAT TREATED SPRING WINDOWS
Spring windows on most street discs are heat treated to resist wear, increase strength and keep springs from “popping out.”
IMPROVED CLUTCH LIFE & REDUCED NOISE
Most ACT spring-centered assemblies use bushings and cone or wave springs, similar to factory clutch discs. This creates frictional damping to improve clutch life and reduce noise.
PRECISION BROACHED SPLINES
Precision broached splines ensure an exact fit onto the transmission input shaft for long spline life and better clutch release.
SMOOTH PROGRESSIVE ENGAGEMENT
ACT carefully selects the right amount of cushioning between the linings for smooth and progressive engagement characteristics, without sacrificing performance.
MAXIMUM STRENGTH, FATIGUE RESISTANT
Top grade rivets, carefully selected for maximum strength and fatigue resistance, are used to securely fasten the disc assembly.
HEAVY DUTY TORSIONAL DAMPER SPRINGS
Heavy duty torsional damper springs are typically stronger than standard springs and are engineered to suit each application. Quieter operation is ensured from high quality, OE-style torsional dampers.
REDUCED INERTIA FOR FAST SHIFTS
Rigid hub discs have reduced inertia for faster shifts and lower stress on synchronizers, providing race-proven performance with street manageability.
GEAR NOISE WARNING
Gear noise may occur due to the absence of torsional damping springs on rigid-hub discs or stiffer damping springs on Performance street discs. This is normal and does not increase transmission wear.