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The ACT Mod‑Twin 225 HD Sprung race kit delivers heavy‑duty torque capacity for high‑power AWD competition, specified for 2004–2020 Subaru WRX STI use. It combines enhanced ceramic friction plates with a Mono‑Drive sprung hub and a CNC machined flywheel to reduce driveline shock and extend input shaft life. Supplied as a complete, rebuildable race kit with clutch components and hardware.
ACT 04-20 WRX STI Mod Twin HD Race Kit Sprung Mono-Drive Hub Torque Cap 895ft/lbs Not For Street Use
