ProComp/Speedmaster aluminum heads

Not so fast about Bolt them on and go. The set I bought went right to PRH and I am glad because the long term would have created problems. He may chime in and tell you what he found. Quite frankly I don't remember all the details and I don't need to. He is a strait shooter and they are now corrected without question and that's why I sent them there....

JW
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 !!!!