Inlet valve for the TVR Speed 6 engine. This is a high quality inlet valve to fit standard TVR Speed 6 engines. This inlet valve is made to very high specifications for and is plasma gas nitrided to give outstanding wear characteristics. Manufactured from 21-4N (EV8) grade austenitic stainless steel this inlet valve is manufactured from a quality of stainless normally used for good quality exhaust valves. This grade of stainless is more than adequate for this application and is a certified high quality product from one of the worlds major valve manufacturers and offers significant benefits over the standard product from TVR.