Honda Civic Si Si for use only with SPEC proprietary system Year Span 2017-2019 Performance Clutch Kits Product Number Torque Capacity Pricing Choose Clutch Single Stage 1 Product Number SH991-3R Torque Capacity 342 Pricing $0.00 Stage 2 Product Number SH992-3R Torque Capacity 399 Pricing $0.00 Stage 2+ Product Number SH993H-3R Torque Capacity 449 Pricing $0.00 Stage 3 Product Number SH993-3R Torque Capacity 477 Pricing $0.00 Stage 3+ Product Number SH993F-3R Torque Capacity 553 Pricing $0.00 Stage 4 Product Number SH994-3R Torque Capacity 399 Pricing $0.00 Stage 5 Product Number SH995-3R Torque Capacity 659 Pricing $0.00 None Not Available Pricing Flywheels Product Number Pricing Choose Flywheel Aluminum Product Number SH99A-3R Pricing $0.00 Steel Product Number SH99S-3R Pricing $0.00 None Not Available Pricing Questions? Give us a call. 1-800-828-4379