T1S - S07 Mod - Twin 225 HD Rigid Street Kit blends easy pedal feel, smooth but positive engagement with quick shifting for high powered AWDs by combining twice the organic friction surfaces with a no - nonsense rigid Mono - Drive hub in a completely modular design. Each diaphragm spring endures an exclusive four - stage heat treating process. Steel - backed Friction Plates with high quality organic friction materials deliver stable friction coefficient, good heat capacity and long clutch life. These Friction Plates uniformly transfer torque to a Mono - Drive chrome - moly hub which is heat treated for strength and durability extending input shaft life with one continuous spline. The lightweight, rigid design allows for quicker shifts and trouble - free service. This kit includes a CNC - machined and dynamically balanced flywheel, 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 needed). Mod - Twin clutches are fully rebuildable and most components can be ordered separately.