i got a epa test a few months back and got stock muffler welded up to my 3" cat back to pass as my exhaust was loud... i like having a quiet exhaust but sometimes wouldnt mind abit of noise......check this link out www.badlanzhpe.com has anyone installed an exhaust valve like these where u can bypass for example ur back muffler and dump it before the diff or after cat???
i know its illegal but would be good! looks easy to make if u used cable type exhaust valve isntead of a motorised one and dumped it off at the exhaust bend under the diff with a small down pipe...... probly a dumb idea i know, buying a quieter cat back system would be better!..... just curious if anyone has done this mod to there exhaust........