The aFe Large Bore HD DPF-Delete turbo back race exhaust system eliminates the use of the restrictive diesel particulate filter (DPF) for maximum performance and extreme mileage gains. This free flowing exhaust system is constructed out of durable 4", 409 stainless steel and uses bayonet style hangers and band clamps for a clean installation. This system comes complete with all tubing, muffler, bayonet hangers, and band clamps. You will be shocked at the performance and mileage improvement you will see from this system. This system requires the use of a controller with a DPF-delete function.