[blykins]

The Spec clutch will drive you nuts.

Any clutch disc that does not have a full diameter but instead is made like a cross, a 4-leaf clover, or a fan blade will probably have severe chatter and either off/on engagement.

I put a Spec clutch in a customer's '03 Cobra Mustang and I vowed to never use one for a street application.

Between the aluminum flywheel and that clutch, you'll be sick to your stomach.