Flo Pro 2017-2019 Duramax 4″ Downpipe Back Single, No Muffler Kit Pickup ONLY! – FLO 880NM
* IMPORTANT NOTE: These kits will only fit models equipped with the OEM style 4-bolt flange off the turbo direct pipe! If you have a 3-bolt flange, please see our 2015.5 Duramax Exhaust Kits.
In 2017, GMC made a production change in the connection between the catalytic converter and the turbo direct pipe on the L5P. Please ensure you have the newest 4-bolt style flange before ordering any of the kits