With this new air gap group buy Greg has been considering swaping out his heads. He came to me with the idea of buying the 2.02 heads and swaping them with me cause mine are the 1.92's. We would have to swap out the springs though which would probably void our warrenty's. I sent CCH a email asking if that would be the case. I also asked if beings mine are still in the boxes if they would let me return them and exchange them for the 2.02 heads. They sell them for the same price I paid for mine now so maybe I'll get lucky. I'll probably have to eat the shipping cost back and forth which would be like 100 bucks. It would still be cheaper then a set of hughes or eddy heads. I shouldn't have bought **** without knowing how bad my engine was. Live and learn I guess. I don't even know how much of a difference that will make but it must do something