- High quality inlet valves manufactured by G & S Valves - Following Head Sizes available (check your original) : 1.750" or 1.790" diameter. Standard Model 30/40 stem diameter : 11/32". This listing is for a valve with a blank stem (no groove machined) so you can cut it to length and machine the collet groove yourself, if the valve you are replacing is not one of our standard lengths.
Machining the valve to the same length as your original is the best way to ensure that you will have a valve the correct length for your cambox and spacing between cambox and head, particularly important if you are replacing a valve with a more obscure length. This type requires you undertake the final cutting to length yourself.
Note: If you wish us to cut the valve to length and machine the collet groove, please email separately with order - expect £12 charge per valve, and turnaround time of at least 3 weeks.