2009-2016 BMW Z4, 2007-2010 BMW 335i, and 2008-2010 BMW 135i Stage 2R Ceramic Race Disc Clutch Kit with Flywheel by XClutch The XClutch Stage 2R range is designed around the XClutch extra heavy-duty pressure plate. These kits offer increased clamping force over the standard stage 2 equivalents for motorsport applications requiring extra torque capacity. Like the standard stage 2 kits, the Stage 2R range includes a ceramic friction disc for high heat capacity and is recommended for motorsport applications only. Features Alignment Tool Included: Yes Clamping Force % Increase: N/A Clutch Disc Diameter: 9.448 in. Disc Material: Ceramic Disc Type Sprung Solid: Sprung Flywheel Bolts Included: Yes Flywheel Included: Single Mass Flywheel Included: Single Mass Flywheel Step: -0.375 Friction Surface Configuration: Recessed Input Shaft Diameter: 1 3/8 in. Input Spline Quantity: 26 Maximum Torque: 670 lb Pilot Bushing Included: Yes Pressure Plate Bolts Included: Yes Recommended Use: Track Use Release Bearing Included: Yes Spline Grease Included: Yes Benefits Improved Clutch Performance and Feel Applications 2009-2016 BMW Z4 2012-2016 BMW Z4 sDrive28i 2007-2010 BMW 335i 2008-2010 BMW 135i What\’s In The Box? 1 – Stage 2R Ceramic Race Disc Clutch Kit with Flywheel Warranty XClutch offers a limited 12-month/12,000 mile warranty on this product