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The ACT Mod‑Twin 225 XT Sprung street kit fits Subaru 2004–2020 WRX STI models and combines increased organic friction surface area with a sprung Mono‑Drive hub for higher torque handling and smoother engagement. Heat‑treated components and quality friction materials improve heat capacity and service life. The modular, rebuildable kit comes with a balanced flywheel, pressure plate, friction plates and installation hardware.
ACT Subaru 04-20 WRX STI Mod Twin XT Street Kit Sprung Mono-Drive Hub Torque Capacity 875ft/lbs
