Message: while i finally got my 04 QC, 4.7L, auto and put about 95km on her before i did the muffler swap. i put a dynomax ultra flo welded on. man, really throaty on acceleration. sounds tits when idling. much too loud for the wife. lol. but for a straight up muffler swap it sure sounds like major exhaust work was done. sounds like headers when i step on her.it was the 17219 muffler.
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Subject: dynomax results