Cobb's Diesel Performance, LLC News

Written by Patrick Ellis If you are interested in maximizing the flow of your exhaust, the CDP 5" turbo back is for you! It provides maximum flow, for lower EGT's and those making power over 500 rwhp. The kit also combines the best in performance and price! We get lots of questions about how the exhaust installs, what modifications are necessary, etc. I recently installed this kit on my truck with the goal of helping our customers understand the installation process. If you have questions about removing your stock or 4" system, give us a call and we'll be happy to help. But for the purpose of this topic, I'll start with the exhaust already removed. You will notice that the packaging of this sytem is top-notch. Each piece of pipe comes wrapped in newspaper to protect it during shipment. The kit includes: - 5" downpipe - 5" middle section - 5" muffler delete pipe or muffler (depending on your choice) - 5" over the axle piece - 5" exit - Box containing all hangers and installation instructions Start by installing the downpipe. It helps to have someone on top of the truck line up the turbo and downpipe flanges. You'll also want them to install the clamp around the flanges and snug it down. Make sure they don't tighten it completely, as you may need to make adjustments to the downpipe. You just want the downpipe held in place at this point. Next, line up the middle section of the exhaust with the downpipe. At this point, you may find the downpipe needs to be rotated slightly to line up the exhaust straight out the back. Please note, this middle section will need to be cut if you have a quadcab shortbed truck. To make this cut accurately, assemble the rest of the exhaust and mock it up to determine where exactly it needs to be cut. Make the cut and install either the muffler delete pipe or muffler supplied with the kit. You will re-use the stock hangers already located on the truck. There is one in the middle section, two near the muffler and one over the axle. The kit comes with a downpipe hanger, but it will need modification to be installed. It hits the transmission cooler lines and this forces the hanger tip to not lineup with the hanger. I left this hanger off the truck, since the downpipe and remaining sections are properly supported. To make the supplied hanger fit the hanger over the axle, you will need to rotate the tip of the hanger slightly. I accomplished this by using a mallet and vice and tapping the tip until it rotated enough to fit the stock hanger. Overall, this installation is very straight-forward. If you have aptitude with basic handtools and understand the installation procedure, you can do it in 1-1.5 hours. This system requires no welding - unless you are running an Edge or PMT and need to run the O2 sensors. If so, you can purchase O2 bungs at an exhaust shop for around $4. Lineup these bungs with the stock O2 sensor location and install the bungs (or mark them for a muffler shop to weld). To recap, if you have a quadcab shortbed you will need to make a cut to the middle section of the exhaust. If you have a Megacab or longbed, no modification is necessary. Install all u-clamps where the pipe sections meet. A 9/16 socket or wrench will work fine. No welding is required, unless you are installing O2 bungs in the exhaust (Smarty and XRT owners don't have to worry about this). As a diesel enthusiast, I'm very happy with the fit and finish of this kit - and the sound is what I've been wanting since the beginning. The exhaust is fairly tame at cruising speed, but gets extremely loud and deep when you go WOT.