I just got some Denso U-groove spark plugs. I got them one range cooler for my Kenne Bell 6psi kit. Kenne Bell states that they are supposed to be gapped at .035" I got them in the mail and they are at .028" What is the proper way of gapping a plug. And how important is the gap being that it will be under boost. I don't think I fully inderstand the heat ranges of plugs and gapping, maybe some one in here could elaborate on this for me. Thanks