MagnaFlow Exhaust Products 15306 MF Series Performance Cat-Back Exhaust System 100% Stainless Steel, Axle-Back 5 x 11 x 22in. Dual Inlet/Outlet Muffler; 2.5in. Tubing; 4in. Polished Tip Lifetime Warranty Dyno Tested And Proven To Make Power Great Sound, Has A Smooth, Deep Tone.