Jerry Graham pulls heavy ISO tanks through the mountains of West Virginia with his tuned-up Peterbilt 389. The rig sports a 565-hp Cummins ISX tuned to 600 horsepower and 2,050 lb.-ft. of torque with a 13-speed and 3.55 rears. The drivetrain has been completely rebuilt and features a PDI oil cooler to keep temps down. Graham said he's looking to add more chrome to the truck in the near future, in the form of new tank skins, bumper, stacks and fenders.
[Related: Owner's 2016 Western Star pulls conestoga nationwide]
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