DDM and Werks both sell Spec clutches but they have different opinions on which one works best, I have a Spec Stage 2 with the aluminum Spec flywheel, that is about $1300 for the parts. The Stage 2 is only slightly stiffer than stock and will handle over 400 lb/ft of torque easily, I'm in the 380 range, lighter flywheel make a a BIG difference. Don't forget to get the spacer.