Stage 4 1275 Race/Rally Head with 36mm inlets and 31mm exhaust valves. Both inlet and exhaust valves are made from race quality EN21N stainless and are have stelite hardened seats and tips.They use the stronger single collet arrangement with steel top caps. The chambers are fully reworked and de-shrouded and poished and have a nominal chamber volume of 20cc. The ports are opened up fully and the valve guid bosses are removed. Bronze valve guides are fitted and the head is assembled with 185lb double springs which will suit most fast raod cmshaft lifts.
Price includes £120 surcharge for replacement unit. Upon receipt of your replacement serviceable cylinder head, the surcharge will immediately be refunded by our Mail Order department

N.B This will take between 4&5days to be back in your account through the clearing system of the banks.