I have a set of Ravin Z33 mufflers that need to get used, but they are center in offset out. The muffler shop was BS'ing me and tried to sell me 400 bucks worth of stuff which was 2 L40 flows and 2 tips instead of just a couple of tips for the mufflers I already had. Flowmasters American Thunder kit is center in offset out. Will the Ravins really not fit? If they were set up just like the AM kit it should work fine! I'de really like to get them on there as I had a set on my TA that sounded monstrous. Not to mention Ravin is no longer around. At the time I installed the mufflers/shorties/dual 2.5 pipes on my Trans Am All it had was a puny 5.7L with about 200 horsepower, but the sound was that of a finely tuned muscle car without any sloshy gurgle.