The MagnaFlow Aluminized Custom Builder Series 18982 i's weight-optimized and engineered to enhance your diesel truck with the dyno-proven performance and powerful resonant sound that weâ€re famous for. Custom Builder Pipe Kit 18982 features durable corrosion resistant aluminized steel construction and includes a set of 5in. diameter mandrel bent pipes. Each component is produced using advanced CNC precision robotic manufacturing and backed by MagnaFlowâ€s 1-year limited warranty. This emissions-legal downpipe-back kit utilizes a Clamp-On inlet connection and is designed to produce Aggressive exterior and Moderate interior sound levels with a Single Passenger Side Rear exit. Professional installation is recommended due to the possible cutting welding and fabrication required.