2011-2015 Duramax 4" CAT Delete Pipe (431001)

The 431001 by Mel's Manufacturing replaces your stock catalytic converter on your 2011-2015 LML with a high-flow 4" race pipe. By allowing your exhaust to flow more freely you'll receive better throttle response and lower EGTs. Just like all of Mel's Manufacturings Exhaust kits, it will come with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you cruise through the installation process!