The only reason I dumped mine was because I took the exhaust off my Dart Sport and put it on my Swinger, but they were different lengths. It sounds incredible but I probably wouldn't do it again simply because I have to avoid certain places to keep from getting my car disgusting. I'd like to run them out the side eventually. It probably wouldn't matter if it weren't a street application.
mine are 3 1/2" dumped in front of the axle. w/ my home built muffler system. it does not resonate, or smell up the interior either. probly the litest , free flowing you can build. under 400h.p. u probly can get by w/ 2 1/2.