Gibson Performance 65621 Cat-Back Dual Extreme ExhaustExhaust System Kit Cat Back Dual Extreme Exhaust Cat Back Dual Extreme Exhaust; Stainless; 2. 5in. Tubing; 8in. Rd Body; 3. 5in. Center In 3in. Dual Outlet; L 24in.; 4in. Polished Slash Cut Tip; Exit Behind Each Rear Tire; SPECIFICATIONS: Exhaust Type: Cat Back Exit Position: Behind Rear Tire Inlet Inside Diameter: 3. 500 in. Material: Stainless Steel Muffler Body Length: 24. 000 in. Tail Pipe Diameter: 4. 000 in. Tip Diameter: 4. 000 in. Tubing