CS Racing Hammer ClutchCS Racing Hammer Clutches have introduced a new twist to the 2 shoe clutch, instead of bending and bonding the lining on, a square lining is screwed and bonded and then machined with the curve. 3 compounds are available with Epic offering the hardest hit but shortest life, GP in the middle and GT offering the longest lifespan. The Hammer clutches do require the CS 81mm Drum