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put the 4in exhaust on it. you will see lower temps towing, and a little more power. I would leave it stock as far as programing when towing and pray that it dosn't blow. That is what I have been doing and it has been good so far and I have about 90,000 miles on mine.
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Ford f350 6.0 4x4. 4" silverline turbo back, cold air intake, six speed manual tranny, sct x3, 373 rear end, running full synthetic in every part that takes oil.
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