Product Description
Improve airflow and boost reliability on your Duramax with the WEHRLI CUSTOM FAB WCF100355 3" PASSENGER SIDE INTERCOOLER PIPE KIT designed specifically for the 2004.5-2005 LLY Duramax. This high-quality performance upgrade replaces the restrictive factory cold side intercooler pipe with a larger diameter 3-inch mandrel-bent aluminum charge pipe engineered for increased airflow, improved turbo response, and greater durability under high boost conditions.
Built by Wehrli Custom Fabrication, this pipe kit features precision fabricated aluminum tubing, high-strength silicone couplers, and heavy-duty T-bolt clamps to eliminate common factory boost leaks and weak connection points. Whether you are running a stock turbo or an upgraded performance turbocharger, the WCF100355 pipe kit ensures smoother airflow and improved charge air delivery to your intake system.
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Key Features
- Large 3" mandrel-bent aluminum intercooler piping
- Replaces restrictive factory cold side intercooler pipe
- Improves airflow and boost efficiency
- Reduces risk of boost leaks under high pressure
- High-quality silicone couplers included
- Heavy-duty stainless T-bolt clamps
- Precision engineered for LLY Duramax engine bay fitment
- Durable powder-coated finish for corrosion resistance
Fitment
- 2004.5 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LLY
- 2005 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LLY
- 2004.5 GMC Sierra 2500HD / 3500HD 6.6L Duramax LLY
- 2005 GMC Sierra 2500HD / 3500HD 6.6L Duramax LLY
Installation Note: This pipe kit installs on the passenger side (cold side) between the intercooler and intake system and is designed as a direct replacement for the factory charge pipe.
Frequently Asked Questions
What does the passenger side intercooler pipe do?
The passenger side (cold side) pipe carries compressed air from the intercooler to the intake system, delivering cooled charge air to the engine for improved combustion and performance.
Why upgrade the factory intercooler pipe?
The factory LLY piping is smaller and can restrict airflow under higher boost levels. A larger 3" aluminum pipe improves airflow and reduces pressure drop.
Will this kit help prevent boost leaks?
Yes. The high-strength silicone couplers and T-bolt clamps included in this kit help eliminate common boost leak points found in factory piping systems.
Does this work with upgraded turbochargers?
Yes. The WCF100355 intercooler pipe kit works with both factory and aftermarket turbocharger setups on the LLY Duramax platform.
Is tuning required after installation?
No tuning is required for this upgrade. However, improved airflow can complement performance tuning and turbo upgrades.
Specifications for WEHRLI CUSTOM FAB WCF100355
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100355 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Shipping Weight | Approx. 8 lbs |
| Package Dimensions | 28 x 12 x 10 inches |
| Shipping Method | UPS / FedEx Ground |
| Prop 65 Warning | This product may contain chemicals known to the State of California to cause cancer or reproductive harm. For more information visit https://www.P65Warnings.ca.gov |
