aFe POWER Large Bore-HD DPF-Back exhaust creates maximum performance and flow. This free-flowing exhaust system resulted in a max gain of +7 horse power +15 lbs of torque. The exhaust system is constructed out of durable, 2-1/2 IN mandrel bent 409 stainless steel tubing and finished with dual 4 IN polished, 304 stainless steel tips. Comes complete with bayonet style hangers and band clamps utilizes OE mounting location a hassle-free installation.