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Old 02-10-2013, 04:23 PM   #284
Activ3
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Join Date: Feb 2005
Location: Orlando/Miami
Posts: 6,360
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If you're running 11psi I'd be suprised if it made 400whp. As for a turbo back exhaust, with a goal of 500whp I'd run a single 3.5" all the way back.
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