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Old 07-08-2014, 09:23 AM   #12 (permalink)
ANMVQ
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Location: Framingham MA
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With the stock cats back on you'll pick up a lot . Your only seeing 7PSI I had the impeller and was seeing 11-12 PSI and made 457 WHP g37x coupe your going to see a NICE change with the stock cats.
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