Where are all of these clutch threads coming from all of a sudden? Lol.... It's all personal preference and what you like and what your goals are. i went with the Fidanza Lightweight Fly and SPEC stage 2+ clutch. Mine is an unsprung setup, which means neither my flywheel or clutch are sprung. I love it! Everyone will tell you that you have to have a sprung clutch disc. It's all about the feel.