2018 Peterbilt 389 Space for reference Specs: Key Specifications & Features (Varies by Build) Engine Options: Cummins X15 (Performance or Efficiency), PACCAR MX-13. Horsepower: 400 - 605 hp. Torque: 1,450 - 2,050 lb-ft. Transmission: Typically Eaton Fuller 18-speed manual. Driveline: 6x4 (tandem rear axles) common. Suspension: Air Ride (Flex Air, Air Leaf), Paccar Air-Glide. Brakes: All-wheel disc brakes or front disc/rear drum. Axles: Various ratings, often with high-capacity steer axles for heavy haul. Wheelbase: Highly customizable (e.g., 230" day cab, 300" sleeper). Fuel Tanks: Polished aluminum, often large capacity (100-150 gal+). Exterior: Long hood, classic chrome grille/bumper, polished wheels, dual exhaust stacks, visors, and lights. Interior: Premium options like leather seats, full gauge packages, Bluetooth, and integrated stereos. Sleeper: Available in various sizes, from 44" flat tops to 78" integrated units. Customization Examples Lightweight/Show Truck: PACCAR MX-13, 48" sleeper, polished aluminum, Arctic Wrap fuel lines, advanced stereo. Heavy Haul: Cummins X15 (565hp/2050tq), 4-axle (pusher/stinger), double frame, high-capacity axles, Platinum interior. Day Cab: X15 (525hp), Flex Air suspension, 11R22.5 tires, full gauges, custom visor.
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