T1DS-F15 Mod-Twin 225 Track Sprung Race Kit Street/Strip delivers strong torque capacity with a softer launch and smoother more progressive engagement than our Xtreme six-puck disc kits. Designed for drag road race rally and track-focused RWD applications this kit combines twin ceramic friction surfaces with an ultra-durable sprung Mono-Drive hub assembly in a completely modular design. Each diaphragm spring undergoes ACT’s exclusive four-stage heat-treating process for a light consistent pedal feel and superior long-term performance. The new puck-style Friction Plates utilize a modified ceramic formulation that provides a lower initial bite for improved control during corner exits downshifts and traction-limited conditions—while still delivering excellent heat capacity and clutch life. These friction plates uniformly transfer torque through the sprung Mono-Drive hub assembly extending input shaft life and reducing driveline shock from torsional vibration. This complete kit includes a CNC-machined and dynamically balanced flywheel pressure plate cover diaphragm spring face puck-style ceramic friction plates sprung Mono-Drive hub assembly floater release bearing alignment tool and pilot bearing (if required). Mod-Twin clutches are fully rebuildable with most components available individually.