It was a 15whp gain, with an approximate 12ft/lbs, the HFC's by far, are the best bang for the buck as far as money/power, get them asap, you'll love the gains/sound, it really hits a sweet note between 3500 and 5500rpms, sounds like a damn indy car, haha.
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2011 Mustang 5.0 | 3.55's | Lethal Performance off road H-Pipe | Magnaflow Muffler Delete | JLT CAI/Bama tuned 417whp/ 404 ft/lbs
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