14mm 12/4 crossflow cylinder head. Pressure tested and new valve guides have been installed with the valve seats re- cut 1" 9/16 inlet and 1" 7/16 exhaust.The cylinder head is also supplied Riley Register 1" 9/16 inlet and 1" 7/16 exhaust valves.
Broken down. Not working. Could bake a working engine from the 2. Found in grandfathers / uncles garage along with large amount of other de Dion parts..