2017-2023 Duramax L5P Dirty 4" CAT & DPF Race Pipe w/ Muffler (DDC-3GM17M)

The DDC-3GM17M is a 4" CAT and DPF Race Pipe kit designed for 2017-2023 L5P Duramax 6.6L trucks. This system replaces restrictive factory components with high-flow 4" piping to boost torque, improve fuel efficiency, and unleash a deeper, more aggressive exhaust tone. Built for long-term reliability and a precise fit, this kit allows your L5P to breathe properly and perform at its peak.

Why Shop Dirty Exhausts?
When you buy from Dirty Diesel, you’re buying peace of mind. We’ve put in the work to bring you exhaust systems that meet our strict standards for durability and flow. Every kit is vetted for a precision, bolt-on fit, ensuring you get a high-performance system that sounds as good as it performs, without the headache of poor fitment or subpar materials.