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Wehrli 2020+ Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Gloss Black
Replace the factory plastic intercooler plumbing on your 2020+ Chevrolet Silverado HD or GMC Sierra HD with the Wehrli Custom Fabrication Passenger Side 3.5-inch Intercooler Pipe in Gloss Black, designed specifically for the 6.6L L5P Duramax diesel engine. The larger 3.5-inch diameter provides increased airflow capacity compared to the OEM components, helping reduce charge air temps and improve turbo efficiency — especially under heavy tow loads or high-boost applications.
Precision-fabricated from mandrel-bent aluminum in the USA, this Gloss Black powder-coated pipe is built to withstand extreme heat cycles and underhood conditions. It installs directly in place of the factory passenger-side intercooler tube with no modifications required.
Key Features
- Fits: 2020+ Chevrolet Silverado 2500HD / 3500HD and GMC Sierra 2500HD / 3500HD with 6.6L L5P Duramax diesel
- Passenger side 3.5-inch intercooler pipe — larger than stock for enhanced airflow
- Mandrel-bent aluminum construction — lightweight, strong, and precisely formed
- Gloss Black powder coat — clean, stealth look that resists heat and corrosion
- Includes silicone couplers and T-bolt clamps for a secure, boost-leak-free connection
- Direct bolt-on replacement — no cutting or drilling required
- Made in the USA by Wehrli Custom Fabrication (WCFab)
- EPA Compliant | MPN: WCF100381-GB
Whether you're looking to improve towing efficiency, reduce EGTs, or squeeze more power from your modified L5P, the Wehrli passenger side intercooler pipe is a foundational upgrade every Duramax diesel owner should consider. Combine with the matching driver side pipe for a complete intercooler pipe kit.