Big valve Honda GX390 aftermarket performance cylinder head. Our GX390 racing head includes cylinder head, big valve seats installed, multi-angle valve job, ported, milled, flow tested and assembled. Includes stainless steel valves, titanium valve spring retainers, automotive bead style valve locks and dual valve spring package.
SELECT THE AMOUNT YOU WOULD LIKE TO HAVE MILLED OFF OF THE HEAD DECK SURFACE.