Profile: Diesel Performance Parts, Inc. offers exhaust systems for power stroke and diesel trucks. Our aluminized steel systems are available in both single and cool dual system designs. They are constructed entirely of aluminized steel mandrel bent tubing components. The down pipe is designed to end before the transmission cross member, eliminating the need to remove the cross member to install the system. The muffler is six-inches round by thirty-inches long, containing an inner packing material made of stainless steel wool, with a ceramic wool outer packing.