Hi guys, i have a ? for you, i ordered the rpm airgap for my 318, they sent me the standard rpm instead. I was just if they is a big difference in horsepower between the two intakes? I was just wondering if i should send it back, or not be bothered with the hassle and just keep it, the intake and my heads are port matched. Is there a big difference? should i keep it or send it back for the air gap, thanks for helping me make up my mind Newathis