that seems to be the average gain for the first exhaust mod, high flow cats will net you about another 2-3, but will make the car sound much better. Glad you like the exhaust! Intakes and a tune will put you comfortably over the 300 mark.
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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
Last edited by Red370; 09-25-2010 at 05:30 PM.
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