AERODYNAMIC - Model 386 Day Cab Solid Performance and Aerodynamic Versatility The Peterbilt Model 386 Day Cab is a powerful and versatile high-performance tractor, ideal for fleets, regional hauling and pickup and delivery applications. The Model 386 Day Cab features a 126” BBC, and offers a full range of heavy duty suspension, brake, drivetrain and big block engine options of up to 600 HP. Designed for operational efficiency, the Model 386 Day Cab features a two-piece windshield for cost-efficient glass replacement and a multiplex electrical system for diagnostic simplicity and reliability. Visibility is enhanced with a contoured sunvisor, dramatically sloped hood and a high-intensity forward lighting system that features an impact resistant Lexan® lens and requires no special tools for lamp adjustment or bulb replacement. The Model 386 Day Cab combines powerful performance and aerodynamic versatility with legendary durability and dependability.