Quote:
Originally Posted by Nate219BRZ
mine quieted down a bit after a few weeks I like it loud, so I altered some stuff to make it louder. I have an original prototype exhaust from last year. not sure of the differences.
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Difference is muffler size is larger and an offset option to make it deep tone sounding. Also a 3" version. You can still order a 4" non offset though. One is just more ideal for a carless header.