Advanced Clutch Mod-Twin 225 HD Sprung Race T1RS-MZ02 Mod-Twin 225 HD Sprung Race Kit performs aggressive launches and smoother shifting in high powered AWD???s by combining twice the ceramic friction surfaces with an ultra-durable Mono-Drive sprung hub assembly in a completely modular design. Each diaphragm spring endures an exclusive four-stage heat treating process providing a consistent light pedal feel. Puck-style Friction Plates with high quality ceramic friction materials deliver high friction coefficient, superior heat capacity, and long clutch life. These Friction Plates uniformly transfer torque to a Mono-Drive sprung hub assembly which extends input shaft life and reduces driveline shock from torsional vibration. This 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, 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. Notes: Flywheel requires counterweight (not included). Features: Predictable aggressive engagement, light pedal effort, smooth shifting, possible start-off judder with OE to mild transmission gear noise Forged Aluminum Cover, Mono-drive hub, exclusive diaphragm, premium friction materials, and hardened wear points ensure this long-life twin performs and survives under the most demanding conditions Delivers maximum performance and high heat tolerance by combining robust design, strategic features, choice materials, and close tolerances Drag, Road, or Rally Racing Applying tactical engineering to the MOD-TWIN, ACT presents unique solutions to common tradeoffs found on twin disc clutches, resulting in an ultra-durable, customer serviceable, long-lasting clutch with very high torque capacity. All are 100% clamp load tested, balanced and SFI certified Specifications: Clutch Master Cylinder Included: No Grease Included: Yes Grade Type: Performance Flywheel Included: Yes Pilot Bushing Included: No Pressure Plate Type: Heavy Duty Release Bearing Included: Yes Clutch Disc Diameter: 8.8 in Clutch Disc Diameter: 225 mm Disc Material: Ceramic Input Spline Quantity: 23 Input Shaft Diameter: 1 in Alignment Tool Included: Yes Disc Type Sprung Solid: Sprung Clutch Slave Cylinder Included: No Flywheel Bolts Included: Yes Pilot Bearing Included: Yes Product Weight (lbs.): 28 SFI: 1.2 Torque Capacity (ft/lbs.): 800 Torque Capacity Over OE: 1.81 References Installation Instructions Applications 1986 Mazda RX-7 Turbo 1987 Mazda RX-7 Turbo 1988 Mazda RX-7 10th Anniversary 1988 Mazda RX-7 Turbo 1989 Mazda RX-7 Turbo 1990 Mazda RX-7 Turbo 1991 Mazda RX-7 Turbo