385, Heavy Duty Trucks - Flatbed Trucks, Caterpillar C13, 13 Spd, U10521: 2004 Peterbilt Flatbed U10521 is a 2004 Peterbilt Flatbed truck that hauled landscape materials around the greater Bay Area. This low mileage Pete 385 is a factory flat bed set up with a Moffett Forklift Kit at the rear. If that wasn t enough, U10521 is a low cost per mile PreCarb California truck. 2004 Peterbilt Flatbed Quick Specs: Low miles California Truck 20 Reliance Bed 13 Speed Air Trac Suspension with Tracking Arms Factory Built Forklift Kit, 375 Horse Power, Air Trac Suspension, Aluminum Wheels, 235 Wheel Base, 24.5, Tandem Axle, Ratio,