GEARHEAD

I've been impressed with my Exedy Hyper Single. It uses a specific chromoly flywheel. Total assembly weight was basically the same as my stock clutch with 7 lb aluminum flywheel. I have been using this clutch for several years for road, track, and auto-x both NA and with ~10 psi boost. This replaced my factory clutch when NA due to a drive strap failure at the track. The Exedy has a more positive engagement than stock and is still manageable in traffic (not as easy as stock). One note - the clutch is very difficult to modulate during break-in but gets better.

markhs2

OS Giken twin disc TS2A is the lightest and extremely well made. The flywheel is made specifically for the twin disc as a system.

There is much less rotational inertia as it is much smaller in diameter.