Medium Duty trucks are smaller than the Class 8 Semi but bigger than pickups. These medium duty trucks can be anything from a school bus to a box truck. Pure Diesel Power carries a full line of medium duty truck parts including filters, upgraded parts and electronic performance parts. We offer fuel filters, serpentine belts, power modules, and more. All to help your truck or fleet running great. We offer both original and aftermarket parts. For general questions or assistance on finding a product, call us today.