josh817 Posted November 14, 2009 Share Posted November 14, 2009 I am researching a 2.5inch exhaust for my S130 and I found the BORLA 40348 ProXS Muffler 2.5". I want to try and use that because it has a single 2.5" into it and dual 2.5" out of it. My theory is that having dual outlets will allow the muffler to release exhaust gas at lower velocity than having single in/single out. I am hoping that lower velocity will be quieter with similar performance to the single in/single out. I think as long as the velocity within the pipe is high, you are fine, unless you put the muffler midway. Quote Link to comment Share on other sites More sharing options...
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