i put a 4" on my power strokeeek: i know wrong forum but...) and it lowered exhaust temps and better fuel mileage. toss the muffler in the trash when you get a system. sounds better w/o it.
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eek: i know wrong forum but...) and it lowered exhaust temps and better fuel mileage. toss the muffler in the trash when you get a system. sounds better w/o it.
