Whether you bent all the valves in your 944 when the cam belt broke or you have a 924 that is just tired and needs some top end attention, we can help! Let our expert machine shop take the hassle out of cylinder-head remanufacturing. Install our rebuilt units with confidence. All cylinder heads include new valves, valve guides, valve springs and valve seals (and a 6-month, 6,000-mile warranty).