Replace the restrictive crushed factory down pipe on your 2017+ L5P Duramax with this 3.5" Down Pipe for improved exhaust flow. Black Coated with Heat Resistance. Down Pipe includes bungs for sensors and NO tuning required to use this down pipe.
***Connects to the DOC (Diesel Oxidation Catalyst) outlet flange and mates with OEM exhaust system front pipe with the 4 bolt style flange connection.***