The MagnaFlow Custom Builder Pipe Series Turbo-Back Performance Exhaust 17878 utilizes a weight-optimized emissions-legal design engineered to enhance your diesel truck with our signature resonant sound and dyno-proven performance. This turbo-back 4in. diameter Custom Builder Pipe kit is made of durable corrosion resistant stainless steel and produced using CNC precision robotic manufacturing techniques all backed by MagnaFlow's limited lifetime warranty. Exhaust kit 17878's mandrel bent pipes have been tuned to produce Aggressive interior and Very Aggressive exterior sound levels. The system terminates in a Single Passenger Side Rear exit. Professional installation is recommended due to the possible cutting welding and fabrication required.