Valves, guides, stem seals and head gasket for the TVR Speed 6 engine. This is a complete kit for the replacement of all valves and guides in a TVR Speed 6 engine. Using very high quality components throughout this kit price represents a significant saving over the individual parts. The inlet and exhaust valves are manufactured from by one of the worlds major performance valve manufacturers and are plasma gas nitrided to the highest standards. The stem seals are viton and guides cast iron so you cannot fit better to your TVR!