ACT Twin Disc Extreme Race Clutch Kit | Dodge Challenger RT/SRT8 (11) (T2R-D04)2011 Dodge Challenger RT SRT8 Twin Disc XT Race Kit by ACT T2R D04 race, twin disc kit offers twice the number of disc surfaces for better wear, heat capacity and long life compared to single disc kits. These kits use a proprietary Positive Lift Floater System design, which results in quiet operation with no floater rattle and no posts to wear. ACT twin disc kits undergo an exclusive four stage, heat treating process on all diaphragms. The ACT twin