A10 Road Rocket and Super Rocket inlet valve 1956 - 1959

For Road Rock engines from 1956 to 1959, from engine CA10R-6001. 

BSA part number 67-968

The valve stems are hardened by the pulsed plasma hardening process, which improves the resistance to wear and the anti-friction qualities by increasing the surface hardness along the valve stem, while retaining the inherent corrosion resistance of the material at the valve seat.

Head 1.415" diameter, length 3.96", stem 0.310"