5" Turbo Back Exhaust System for the 2011-2018 C&C Cummins Trucks. It allows you to drop out the restrictive factory exhaust and replace it with a high-flow straight pipe kit.  It comes with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you cruise through the installation process. This kit not only sounds better but will also lower your EGT's, Improve Throttle Response, and Increase Torque in your 6.7L.