Engine - Cylinder Heads Components - Bolt Kit, Cylinder Head

From GM Performance - This high quality cylinder head bolt kit has enough bolts to install either iron or aluminum heads. This kit includes eight of 7/16-14x2.08 inch short bolts P/N 12367331, 24 of 7/16-14x4.06 inch long bolts P/N 12367330, eight of 7/16-14x5.06 inch extra long bolts P/N 12367329, and 40 of special hardened washers P/N 14011040. For single service replacement use part numbers above. These bolts do not have thread sealer on them because on 502 engines they have blind bolt hold. For all other big block usage, add thread sealer. Technical Note: When you complete your engine you will have left overs because this is a universal kit for both iron and aluminum heads.