Anyone with a LS1 mac catback?
i am trying to figure out why mac catbacks arent popular with the ls1 crowd my friends dynoed like 15hp more with just the catback mod mine is tame at crusing but at wot it is loud as **** i am not much on flowmasters on a ls1 sound like everyother mustang lol i used to own foxbodys so i want to have the chevy sound lol thanks for everyones replys



