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Old 11-17-2012, 12:10 PM   #28
Scooby Newbie
Member#: 66206
Join Date: Jul 2004
2005 WRX STi


Unless you're making a lot of horsepower (a lot!) 3" exhaust is more than you need.

I'm talking 450+hp, and maybe even then, you don't need to have a 3" exhaust.
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