MagnaFlow 15218 Cat-Back Exhaust System 100% Stainless Steel, Axle-Back 4 x 9 x 14in. Front Muffler, Dual 5 x 8 x 14in. Rear Mufflers; 2.50in Tubing; 4in. Polished Tips Lifetime Warranty Dyno Tested And Proven To Make Power Great Sound, Has A Smooth, Deep Tone.