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Boomboom What are you seeing with your X? Did the 4" exhaust and DP tuner increase your milage at all?
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01 Excursion, 4 x 4 Limited, 265/75/16 Firestone Transforce HT maintain 72 psi front- 70 psi in rear, Superchip, 3.73 rear end, Airbags front and back (10-15 psi) 275,000 miles.
01 F-350 dually, 4 x 4 Lariat, Hypertech chip, AFE air intake, 4 inch MBR Exhaust, rear air bags (25-50 psi) 110,000 miles.
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