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Old 04-09-2011, 08:31 PM   #1
cali yaris
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Free up the flow and maybe gain a tiny bit of power.
You can't free up the flow AND have it as quiet at stock.

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If I can get 15hp more I'm good but don't want to sound like a wanna be race car.
You won't; maybe 5 at best.
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Old 04-09-2011, 08:45 PM   #2
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Originally Posted by cali yaris View Post
You can't free up the flow AND have it as quiet at stock.



You won't; maybe 5 at best.

You could mimick the stock multi-pass set up by using two or three high performance mufflers. I'm not sure how many mufflers you can cram in the stock location, but going through three large diameter turbo mufflers might be pretty quiet. Rearward through the first, forward through the second, rearward through the third.
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