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Old 03-08-2013, 06:53 AM   #16
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Join Date: Jul 2000
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Location: Way South Shore MA
WRX /WRX/Cooper S


Originally Posted by vision.dynamix View Post
The factory uppipes only solve the issue of the cat breaking up. They still flow like garbage.
I thought the only problem with the OE UP was the cat? Once removed it flowed well enough that an aftermarket unit isn't much (if any) improvement?

None of the aftermarket pipes are larger diameter, right? The EM and turbo inlet sizes aren't changing.
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