Your safest and most legal bet is just go with a Cat back or an axle back exhaust.... Theyre cheaper, less toublesome, will pass emissions usually and still gain some horse power. Some guys on here have also done HFC and headers and have seen improved HP but some torque loss. When the vehicle has a tune it might make up for that but at this point I am unsure if anyone has gone through with it yet.
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Remember kids, NAWZ energy drink will not make your car go faster.
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