Gibson 65668 Stainless Dual Extreme Performance Cat-Back Exhaust System 2.25-inch Stainless mandrel bent tubing Gibson Muffler features a baffled & chambered design, no internal packing, powerful deep tone 4.0 inch; Polished; T304 Stainless; Rolled; Slash- Cut Tip; Clamp on Exits Behind Each Rear Tire Lifetime Limited Warranty