I have a really HUGE complaint about clearwater cylinder heads also. I ordered a head from them... put in on the car, started it and realized its not the head that needs to be fixed, its the block. So we took if off and boxed it back up to send it back and called them to let them know it was THEIR part I was sending back, not the original off the car. They said I couldnt return it because we started the car with it on. NO WHERE ON THEIR WEBSITE OR ON THE RECIEPT did it say you can not return the part if you started the car. It was on the car... read full review »