SKU: actT1R-S07 ACT Mod Twin HD Race Kit with Unsprung Hub for 04-20 Subaru WRX/STI

ACT Mod Twin HD Race Kit with Unsprung Hub for 04-20 Subaru WRX/STI

The T1R-S07 Mod-Twin 225 HD Rigid Race Kit is engineered to dominate aggressive launches and rapid shifting in high-powered AWD vehicles. Combining twice the ceramic friction surfaces with a robust solid Mono-Drive hub, this modular design ensures unmatched performance and durability. Each diaphragm spring undergoes an exclusive four-stage heat treating process, providing a consistently light pedal feel for enhanced driving comfort. Puck-style ceramic friction plates deliver a high friction coefficient, superior heat capacity, and extended clutch life, ensuring reliable power transfer under demanding conditions.

The rigid Mono-Drive chrome-moly hub is heat-treated for exceptional strength and durability, featuring one continuous spline to extend input shaft life. A CNC-machined and dynamically balanced flywheel, paired with a lightweight and rigid design, facilitates quicker shifts and trouble-free service. The comprehensive kit includes a pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, rigid Mono-Drive hub, floater, patented Monoloc Collar, release bearing, alignment tool, and pilot bearing (if required). Fully rebuildable, the Mod-Twin 225 HD allows most components to be ordered separately, ensuring longevity and adaptability.

Designed for peak performance and reliability, the T1R-S07 Mod-Twin 225 HD Rigid Race Kit delivers the ultimate combination of strength, precision, and efficiency, making it the ideal choice for high-performance driving enthusiasts.

Important Note About Vehicle Fitment

Our vehicle fitment selection tool is currently in development, and we’re working hard to ensure the accuracy of our data. While most models and trims should be correct, there may be some instances where fitment information is incomplete or an alternative option is available.

If you’re unsure about the compatibility of a part with your vehicle, please don’t hesitate to reach out to us for assistance. Our team is here to help you find the perfect fit!