Solve one of the most common Duramax maintenance headaches with the Wehrli Custom Fabrication 2-inch Stainless Up Pipe Kit with Gaskets for the 2017–2023 Chevrolet 6.6L L5P Duramax diesel. Wehrli's stainless steel up pipes replace the factory units that are prone to cracking, warping, and exhaust leaks — especially under the thermal cycling of a hard-working or modified diesel engine.
Constructed from mandrel-bent stainless steel tubing, these up pipes provide superior heat resistance and corrosion protection compared to the OEM pipes. The complete kit includes all necessary gaskets for a thorough, leak-free installation. Wehrli precision-fits these pipes to the 2017–2023 L5P Duramax platform for a direct, no-modification bolt-on installation.
Key Features
- Fits: 2017–2023 Chevrolet Silverado 2500HD / 3500HD and GMC Sierra 2500HD / 3500HD with 6.6L L5P Duramax diesel
- 2-inch stainless steel up pipe kit — complete driver and passenger side set
- Mandrel-bent stainless steel — maximum heat resistance and durability over OEM
- Includes all gaskets for a complete, exhaust-leak-free installation
- Eliminates chronic OEM up pipe cracking and failure
- Direct bolt-on fit — no modifications required
- Made in the USA by Wehrli Custom Fabrication (WCFab)
- EPA Compliant | MPN: WCF100624
A top-rated upgrade for 2017–2023 L5P Duramax owners dealing with exhaust ticks, smoke smells, or known up pipe failures. The Wehrli stainless up pipe kit is the definitive long-term solution for improved exhaust sealing and peace of mind on your HD Duramax truck.