Borla 19-22 RAM 2500/ 3500 6.4L V8 AT 2/4WD 3in S-TYPE Cat-Back Silver TipsThis 3. 5" diameter BORLA system utilizes the factory transition pipe between the cats and the muffler so that it will fit ALL Cab and Bed configurations. EXCEPT vehicles with Dual Rear Wheels. The 140851 Cat Back system by BORLA is made to give you the best performance, sound and durability possible. It utilizes high quality T 304 stainless steel, superior to T 409, for durability, mandrel bent pipes for high flow, and precision computer numerical