Ford Mustang V6 4.0L thru April 2007 Year Span 2005-2007 Performance Clutch Kits Product Number Torque Capacity Pricing Choose Clutch Single Stage 1 Product Number SF661 Torque Capacity 411 Pricing $444.00 Stage 2 Product Number SF662 Torque Capacity 470 Pricing $549.00 Stage 2+ Product Number SF663H Torque Capacity 528 Pricing $579.00 Stage 3 Product Number SF663 Torque Capacity 562 Pricing $529.00 Stage 3+ Product Number SF663F Torque Capacity 653 Pricing $649.00 Stage 4 Product Number SF664 Torque Capacity 562 Pricing $529.00 Stage 5 Product Number SF665 Torque Capacity 791 Pricing $649.00 None Not Available Pricing Flywheels Product Number Pricing Choose Flywheel Aluminum Product Number SF66A Pricing $525.00 None Not Available Pricing Specialty Products 26 Spline Disc Hub Option $0 for use with transmissions utilizing a 26 x 1 1/8 spline input shaft ? Billet Flywheel Replacement Friction Plate Kit with Fasteners $79.00 Diamond ground, includes self-locking fasteners Questions? Give us a call. 1-800-828-4379