SS_Firehawk

I would just go with the headers. You can always quiet them down by going with a quieter exhaust. Especially if you plan to run cats. F.I headers, exhaust with cats and 18 inch resonators has volume, but not obnoxious. I have PPE headers (loud and raspy) with the Tanabe exhaust (quiet and smooth). I finished it off using Motordyne's Y pipe and cat. It's not loud during normal driving, but at WOT, she screams like a banshee, volume control is now with my foot.

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