SportChassis P4XL Clinton, Okla.-based SportChassis turns Freightliner big-rig trucks into personal luxury SUVs for those with extreme towing and hauling needs. has a custom aluminum body built on Freightliner's M2 chassis. A Cummins 8.3-liter 6-cylinder diesel engine puts out 330 horsepower and 1,050 lb-ft of torque — plenty for heavy hauling. But if that's simply not enough, an optional Detroit Diesel 12.8-liter 6-cylinder ups output to 450 horses and a ground-thumping 1,650 lb-ft of torque.
