Aluminum front and rear head set is for 74" and 80" Flatheads. This set is casted after the OE Cast Ironheads, which features the squish "WR" combustion chamber.
Head set accepts 18mm spark plugs and stock type head bolts. Heads are machined for the brass primer cups. Uses 1-3/8" large hex 18mm plugs. *NOTE: Must order spark plugs, head bolts, washer set and head primer cups separately.
Made by Motortechnic Mfg. Germany