Ouch......the s-tune does not get as much Hp gain as the H-pipe. Probably 2hp at most, mine came in the same as stock on the dyno. HFC and CAi has the best gains with the total mods. Netted about 18 with s-tune, HFC and CAI. With a tune maybe squeeze a few more Hp. I really have been dying the FI pipe for some and Motordyne. G/L with trade, the nice thing going with the s-tune is the name,fit and finish.
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