Kind of a side note. When the engines overheat and drop the valve seats, it usually breaks the piston. That hot debris ends up getting blown back into the plastic intake, melts into the plastic, and is pretty much impossible to get all the debris out. If you don't install a NEW intake, the debris usually works loose and trashes the new engine. For this reason, most of the engine re-man companies will not warranty their re-mans without the purchase of a new intake.