I searched but it seems like not many peopel have their a/f checked after they recieve their tunes. Has anyone had bad a/f ratios or detonation from one of his tunes? I had an 04 cobra with a tune from amazon and a/f was rediculous and pinged like crazy(im just lucky i was on a dyno at a very good shop when it happened). Everything I have read has been 100% postive form him, just double checkin' :-D