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Old 03-30-2013, 06:14 AM   #21
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All Duratech's had the mani cat from the get go in 04.The cats can flow far more than what these engines can push out.You will not see any consistent or measurable gains by deleting the cats.If you want to get a header then pick up a small Magnaflow universal cat and put it in right after the header flange and relocate the o2 sensors.You will still have a fully functioning cat monitoring with no emissions worries and get the performance boost with the header.
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