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Discussion Starter #1
I absolutely love the way our Si's sound stock, but I still think they're too quiet. :vtec: So I was wondering what size piping do our stock exhausts use? And for anyone who has experience with fabricating custom exhausts, if we used 3 inch piping from the cat back, but kept the stock muffler, would we retain a similar sound while increasing the volume and flow? I don't really know anything about the physics of exhaust systems, so if anyone with more knowledge than me can help a brotha out I'd appreciate it.

Cap'n
 
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