ProComp/Speedmaster aluminum heads

Like almost any manufactured head. Send them off to get checked. But hey, they are real nice for the price and they are on sale NOW !!!!

No question it's a killer deal. They fit my needs. Plus PRH tuned them up a little since he had them. Personally though if I wanted to be a little more serious I would look at the Trickflows however that comes at a cost..... And even then I would probably not trust them OOTB lol....

JW