Ford has boosted the horsepower and increased torque across its range of F-Series Super Duty pickups for 2015. Vehicles from the F-250 to F-450 will receive Ford’s second-generation 6.7L Power Stroke V8 turbo diesel with 440 hp., up from 400, and 860 lbs.-ft. of torque, up from 800 lbs.-ft. With the added power, the 2015 F-450 now has maximum towing capacity of 31,200 lbs. and a gross combined weight rating of 40,000 lbs. Tow ratings for the F-350 have also increased, up to 26,500 lbs. ...

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