These valves of head size 1.215" / 30.86mm have been made from top grade performance material only for MINISPLUS . They are light, strong, coated black for longer life, and the unique design feature is LONGER LENGTH and radius groove.
This length 89.40mm is the same as MK1 Cooper S and has several advantages in performance or race applications. With any performance camshaft there is normally a good chance of having valve spring coil bind, or the cap knocks the valve stem off the guide at least. These new valves allow fitment of a range of Cooper S valve springs, more reliable valve stem seals and better valve spring installed pressures, which means longer camshaft life.
These new valves have been designed in conjunction with our own Australian performance GURU...Graham Russell and the head size is very suitable. In some applications you may need rocker gear spacers for correct geometry.
A set of inlet and exhaust are shown in the photo, but this is for one INLET valve.
