I had no rub, rattle or hanger issues with the install of my American Thunder kit. Took 30 minutes to remove the stock and replace with the new ones. Hardest part was lining them up, took a few trys to get it just right.05GTSILVER said:do not do the flowmasters your self. they are charging about 50-75 for install, that's worth it. the flowmasters are very big mufflers and are a pain to install, and they are very likely to rattle, bc they rub on the rear most hangers, rear most bolt. and they also tend not to line up perfect without some adjustment to the over axle pipe, rotating it a bit. but do get these mufflers, the sound is worth it, and bc of the baffle design (i.e. not fiberglass packing) the sound will NEVER change.
