This FLO - PRO FLO - 21122 4 - inch aluminized test pipe is a game - changer for 2011 - 2012 Dodge Ram Cab & Chassis trucks with 6.7L Cummins engines. Say goodbye to the OEM CAT & DPF! It replaces them with a straight pipe, eliminating exhaust restrictions and allowing for a more free - flowing exhaust. Flo - Pro Exhausts are designed to fit all wheelbase and cab configurations unless otherwise stated. To fully delete the emissions system on your Cummins Cab & Chassis, you'll need two pipes. Measure from the back of the cab to the center of the rear wheel. If it's 60 inches, get the FLO - 21124. If it's more than 60 inches, order the FLO - 21125. Key features include deleting the OE DPF & catalytic converter, a 4 - inch aluminized test pipe, a requirement for race tuning, reduced EGTs and increased HP, and an option with or without a muffler. Note that this system only works with Cab & Chassis trucks. Part Number: FLO 21122

Using the FLO - PRO FLO - 21122 4 - inch aluminized test pipe is quite straightforward. First, make sure your truck is a 2011 - 2012 Dodge Ram Cab & Chassis with a 6.7L Cummins engine, as this product is specifically designed for it. When installing, replace the OEM CAT & DPF with this straight pipe. But remember, race tuning is required for it to work properly. Before you start the installation, measure the distance from the back of the cab to the center of the rear wheel. This will help you decide if you need the FLO - 21124 or FLO - 21125 in addition to this pipe for a full emissions system delete. For maintenance, keep an eye on the pipe's condition. Since it's aluminized, it should be relatively corrosion - resistant, but check for any signs of rust or damage regularly. If you notice any issues, it's best to address them right away. And always remember, this system is only for Cab & Chassis trucks, so don't try to use it on other vehicle types.