Gibson Performance 6567 Cat-Back Dual Extreme Exhaust Fits 14-24 2500 3500Exhaust System Kit Cat Back Dual Extreme Exhaust Cat Back Dual Extreme Exhaust; Aluminized; 2. 5 in. Tubing; 4 in. Aluminized Round Slash Cut Tip; Exits Behind Rear Tire; SPECIFICATIONS: Exhaust Type: Dual Exit Position: Dual Split Rear Behind Rear Tires Exit Style: Straight Inlet Inside Diameter: 2. 500 in. Material: Stainless Steel Muffler Type: Chambered Outlet Outside Diameter: 2. 500 in. System Type: Cat Back Tail Pipe Diameter: 2. 500 in. Tip