Inlet valve Plasma hardened made in uk, fits A65 650cc cylinder heads 1962 to 1965 , smaller head type
Valve is hardened using the "Pulsed Plasma Nitriding." process, this gives the valve resistance to wear and anti friction properties , when this type of valve is matched with our Colsibro material valve guides , you have the best combination for valve and guide, for performance and longevity
