CLONE BILLET HEAD 1.350" INTAKEThis superb DED billet aluminum head has a 1. 350" (34. m) intake valve and a 1. 1" (28MMmm) exhaust valve. The valves are moved to the left so the intake valve isn't shrouded by the combustion chamber and cylinder wal to improve flow. It has a combustion chamber volume of 16 ccs. Depending on piston pop up and head gasket thickness this head volume works great for 250 to 300 cc displacements.