Gibson Performance 65681 Cat-Back Dual Extreme Exhaust Fits 14-20 Escalade YukonExhaust System Kit Cat Back Dual Extreme Exhaust Cat Back Dual Extreme Exhaust; Stainless; 3. 5in. 2. 25in. Tubing; 4x9x18 in. Oval Body; 3in. Center In 2. 25in. Dual Outlet; 4in. Rolled Slash Cut Tip; Exit Behind Rear Tires; SPECIFICATIONS: Exhaust Type: Single Exit Position: Dual Split Rear Behind Rear Tires Exit Style: Straight Inlet Inside Diameter: 3. 500 in. Material: 304 Stainless Steel Muffler Body Length: 18. 000 in. Muffler Type: Chambered