Buick Century,Electra,GS,Regal,Skyla 401ci Year Span 1966-1966 Performance Clutch Kits Product Number Torque Capacity Pricing Choose Clutch Single Stage 1 Product Number SC551 Torque Capacity 571 Pricing $359.00 Stage 2 Product Number SC552 Torque Capacity 653 Pricing $479.00 Stage 2+ Product Number SC553H Torque Capacity 733 Pricing $489.00 Stage 3 Product Number SC553 Torque Capacity 780 Pricing $375.00 Stage 3+ Product Number SC553F Torque Capacity 907 Pricing $599.00 Stage 4 Product Number SC554 Torque Capacity 780 Pricing $369.00 Stage 5 Product Number SC555 Torque Capacity 1000 Pricing $579.00 None Not Available Pricing Questions? Give us a call. 1-800-828-4379