I am currently looking for a twin loop muffler for my 2.5" header back system. I was thinkn bout either the SNL or the OBX both have gotten great reviews. I was wander though, those who have either, how long have you had it, how has it held up, and has the sound gotten louder? Also, if theyr any other 2.5'' twin loop mufflers you guys know about let me kno plz. Thanx for your help guys.