Thats pretty hard to believe.But If you friend is a good driver, I could see him hitting 16's. I run low 17's with DC sporth headers, AEM CAI, Aem cam gear(not adjusted), a Axel back knock off greddy exhaust. Mine is Auto and a EX. But ive seen a guy with just a Aem CAI, and a RS*R cat-back exhaust, he had a non-vtec and was AUTO running high 16's. I pretty much felt like ****..haha...But maybe. Make him prove it to you...