a clutch. that it . everything else is there from the custom mounts custom prop and exhaust. the wiring loom that will plug directly into the e30 socket and the l6 with stage1 chp. ported andpolished head, 20000 miles since new piston rings and stem seals, 10000 miles since new stage 2 t34.48. 1000 miles since new grpA headgasket as the head was removed to helicoil a couple of broken manifold studs. ive never blown a headgasket on this either.