ph could have caused this as i was using tap water to mix the antifreeze. (dont anymore) I said these heads had 5000 miles which may be a stretch. probably closer to 3000. so, in that short of time it ate into the heads. thats a junk casting
50,000 miles maybe, not 3000 my eddy heads used the same tap water mix and had zero problems. i even ran straight tap water for a time with the eddies.

wasnt so mad about the problem as happens. I was more mad how i was treated by 440source and the fact that they didnt care.