Replace the restrictive crushed factory downpipe on your 2017-2023 L5P Duramax with this 3.5" Down Pipe for improved exhaust flow. Black Ceramic Coated and Heat wrapped. Down Pipe includes bungs for sensors and NO tuning required to use this downpipe.
***Connects to the DOC (Diesel Oxidation Catalyst) outlet flange and mates with OEM exhaust system front pipe with the 4 bolt style flange connection.***
WCFab piping kits and emissions-compliant tuning recommended for optimum performance gains.
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Reviewed by: JOE05/28/2020 03:41AM
Product ownership: Less than 1 monthNot purchased from: Wehrli Custom Fabrication - WCFab
I used this down pipe and replaced the up pipes with wc fab 2". I am not tuned and just have a derringer. My turbo seems to have less dead peddle. Truck seems to be more awake just overall after swapping out these parts. Pro tip: If you are going to go through the pain of swapping the down pipe it's only a bit more work to do the up pipes and totally worth it.