Upgrade your 2017-2019 Duramax L5P cab and chassis with this high-quality 4" downpipe back exhaust system. This system is designed to increase horsepower and torque while improving fuel efficiency and overall engine performance. The no muffler design allows for maximum exhaust flow and a deep, aggressive tone. Constructed from heavy-duty aluminized steel, this exhaust system is built to withstand the toughest conditions and provide long-lasting durability. With easy bolt-on installation, this exhaust system is a must-have upgrade for any Duramax L5P cab and chassis owner looking to enhance their vehicle's performance and sound.