A good friend of mine had a set of Magnaflow axle back mufflers from his dad's (now sold) GT500. After multiple attempts to sell the mufflers, he offered them to me for free! I wasted no time ordering the lower valence from American Muscle. My friend even helped me install the items to my 2013 GT. They fit great! It took a just around 2 hours to remove everything, modify the bumper, and re-install. The sound is much louder than stock, and MUCH deeper. The highway drone will take time to get used to, but damn it sounds nice!
I think it depends on which Magnaflows . . . you are probably thinking of the rectangular ones that are relatively mellow . . . I think he has the smaller cans which are fairly loud and I have seen some other reports of drone
I opened the thumbnail in another tab, blew that up, and it does look like the two sides aren't quite symmetrical. Some of it may be the passenger side not sticking out quite as far as the driver side . . . which could at least partly be an issue with the valance not being perfect either.
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