12G940 cylinder head, fully rebuilt in the Seven machine shop with all-new iron valve guides, unleaded exhaust seats, exhaust valves and seals. Inlet valve is large 1.4" size as used on Cooper S and MG Metro. Cleaned and glass-beaded, intake valves and springs checked, resurfaced, and drilled out for heater valve and bypass hose. Drilled for 11 studs.