GM-Chevy Corvette ZR-1 for use with billet single mass flywheel Year Span 1989-1993 Performance Clutch Kits Product Number Torque Capacity Pricing Choose Clutch Single Stage 1 Product Number SC421ZS Torque Capacity 505 Pricing $594.00 Stage 2 Product Number SC422ZS Torque Capacity 600 Pricing $714.00 Stage 2+ Product Number SC423HZS Torque Capacity 665 Pricing $669.00 Stage 3 Product Number SC423ZS Torque Capacity 762 Pricing $836.00 Stage 3+ Product Number SC423FZS Torque Capacity 845 Pricing $866.00 Stage 4 Product Number SC424Z Torque Capacity 762 Pricing $599.00 Stage 5 Product Number SC425Z Torque Capacity 1008 Pricing $826.00 None Not Available Pricing Flywheels Product Number Pricing Choose Flywheel Aluminum Product Number SC05A Pricing $649.00 Steel Product Number SC05S Pricing $625.00 None Not Available Pricing Specialty Products Billet Aluminum Flywheel Replacement Friction Plate with Fasteners (Included on Flywheel) $89 Diamond ground, includes self-locking fasteners Questions? Give us a call. 1-800-828-4379