Flo Pro 2017-2019 Duramax 6.6L, 5″ Downpipe Back Single Race Exhaust with OEM 4-BOLT Flange EC-CC/SB-LB-Dually Pickup ONLY! – FLO SS680
The 5″ Downpipe back race exhaust fits the 20174-2019 Duramax L5P 2500/3500 Pickup trucks with OEM 4-BOLT Flange. Fits Extended cab, crew cab/short box, long box, dually.
* 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.