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hi guys,
i have an '03 F-150 4.6 V8 swb 4x2
all i have done to it so far is a K&N, flowmaster 40 series, and i have a diablo chip but havent installed it yet. with this said, what can i do to the exhaust to improve performance or mileage without sacrificing low end torque. I have heard that certain exhaust mods such as removing the cats, can kill low end torque, any advice would be appreciated, thanks in advance
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