[AJ PwR Jr.]

The AFR number that I was mentioning were based on with all T1R parts installed so lets say , if you have stock header, bpipe and intake , the test pipe alone will lean it down a bit to give it some more power.

13.7~13.9 is a very safe AFR but the fact, the L15A engine stopped to make power after 13.5.

I think most of you didnt realized that when the stock Fit on partial throttle, the AFR is at 14~15 range so with the mods, there's nothing to worry about ruining the engine unless detonation.