they look exactly like the heads my buddy put on his car and the same price. needless to say the guideplates were throwing off the geometry and rockers were popping off the valve and bent about 8 pushrods, the keepers are junk and two broke with sent the valve into the combustion chamber only to be beaten to death by the piston. i would stay away unless you want to put a good set of valves and springs, retainers, keepers in it