Guys if you want the sound do it. If you want that lil red lip poking out behind you grille do it. You are talking about a best and worst case scenerio of +/- 5 hp. So 10hp swing total.
On a 330 hp car you are discussing a 3% change. Outside of perhaps an engine running smoother... only someone on a dyno will be able to tell less then 10% change.
For that differece, do what you want to your car, keep it quiet or make it growl!
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