https://www.honda-acura.net/forums/s...=apex-i+review

here's my input for ya

and, in addition, 3" piping is gonna make you lose way too much low-end and will be a pain to drive, and custom piping -> universal muffler is gonna not be nearly as good, although i guess it would depend on the muffler. my experience with universal mufflers is that they are loud, really loud, and i'll never go back from my apex-i ws.