4″ Truck Cat DPF Delete Exhaust Pipes For 15.5-16 GM & GMC Duramax

Product DescriptionApplication DescriptionAll comments
4 inch dpf back exhaust: 3-Bolt Style Flange
Halfway through 2015, GMC made a production change in the connection between the catalytic converter and the turbo direct pipe on the LML.
Please ensure what you are looking for is the late LML 3-bolt style flange before ordering any of the kits listed on this page. If you want the newer 4-bolt flange instead, please refer to our 2017+ L5P exhaust sytems.