SPEC is a Manufacturer of street high performance and racing clutches and flywheels. Featuring Clutch Kits From street kit Stage 1, 2, 2+, 3, and 3+ to Race Kits Stage 4 and 5. And now the SPEC Super Twin with TQ ratings of over 1500 FT TQ! Every SPEC Clutch Kit and Flywheel has been SFI Approved.

This Stage 3 Clutch Kit Features a carbon semi-metallic 4 or 6 (application dependent) puck sprung or ridgid hub disc that has been the leading puck clutch in drivability, life and torque capacity. This unit is designed for street and race cars that require an aggressive but streetable engagement and high torque capacity. The hub comes in either Sprung or Rigid and is application dependent. The double sprung hud features spring cover relieves for flexibility and both hubs use heat treated components for strength and durability. Also available in 3 puck configuration. The SPEC Stage 3 Clutches are designed to be the ultimate strip and street clutch. A Stage 3 is designed to handle all the power you're putting down and to deliver sharp but smooth engagement. Combining elements of a race clutch with a street clutch means a Stage 3 will hold up to many passes on the strip while still allowing you to let your high performance Mustang stretch its legs on the street.  Great for street, drag, autocross, road racing, pulling, rally and drift.

Kit Part Number: SF503-2 (10 Spline / Stock)
Torque Capacity: 755 ft tq
Fits Vehicles: 2011 Ford Mustang GT V8 5.0, 2011 2012 2013 2014 Ford Mustang V6 3.7L

Clutch Kit Notes: The SF37A billet flywheel is configured to accept the original V6 3.7L clutch and the V8 5.0L Coyote GT clutch. The V8 clutch kits cannot be used with the original dual mass flywheel. Purchasing a complete SPEC package will eliminate the possibility of fitment issues that exist with the superseded factory dealer parts. Stages 1-3+ are recommended for street/strip, while Stages 4-5 are race only. These clutch kits have the 6 bolt pressure plate cover pattern for use in cars through 2/2011 production or in a any car with a 6 bolt pressure plate pattern flywheel. All SPEC modular flywheels have a 6,9 and custom 12 bolt pattern for use with a number of pressure plates.