Gibson 619639 Stainless Single Side Performance Cat-Back Exhaust System 3-inch Stainless mandrel bent tubing Gibson Muffler features a baffled & chambered design, no internal packing, powerful deep tone 4.0 inch; Polished; T304 Stainless ; Round; Slash- Cut Tip; Clamp on Exits Behind Rear Tire Lifetime Limited Warranty