aFe POWER Large Bore-HD DPF-back creates maximum performance. This exhaust system is constructed out of durable, 2-1/2 IN mandrel-bent 409 stainless steel tubing that incorporates a mitered merge collector. The mitered merge collector design is used to reduce turbulence for better flow and performance over the traditional formed collectors. The system also includes dual high-flow resonators to build a mellow performance sound. Comes complete with bayonet style hangers and band clamps utilizes OE mounting location a hassle-free installation.