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depending on the truck, removing the cat will reduce your mileage
i saw a good increas with my headers, 3"hiflow cat and 3" exhuast system
with a open K&N i went up a few miles, not a whole lot thouhg,
i saw a good increas with my headers, 3"hiflow cat and 3" exhuast system
with a open K&N i went up a few miles, not a whole lot thouhg,
