Wehrli WCF100718-GW Stage 1 High Flow Bundle Kit for 17-19 GM 6.6L L5P

Vehicle Fitment

• 2017-2019 Chevrolet Silverado 2500HD/3500HD & GMC Sierra 2500HD/3500HD (6.6L L5P Duramax)

Features

• Stage 1 high flow intercooler bundle kit replaces restrictive OEM plumbing
• Includes 3" hot-side and 3.5" cold-side aluminum intercooler pipes
• CNC machined flange with double O-rings for superior boost sealing
• Gloss White powder-coated finish (WCF100718-GW) for custom appearance
• Upgraded silicone boots and stainless steel T-bolt clamps included
• Eliminates common boost leak points in factory design
• Direct bolt-on installation - no tuning required
• Retains factory connection points and sensors

Specifications

• Brand: Wehrli Custom Fabrication
• Part Number: WCF100718-GW
• System Type: Stage 1 high flow bundle kit
• Hot Side Pipe Diameter: 3" mandrel-bent aluminum
• Cold Side Pipe Diameter: 3.5" mandrel-bent aluminum
• Finish: Gloss White powder coat
• Compatibility: 2017-2019 GM 6.6L L5P Duramax diesel
• Installation: Bolt-on - no ECU tuning needed

Included Components

• 1x 3" hot-side intercooler pipe - Gloss White
• 1x 3.5" cold-side intercooler pipe - Gloss White
• 2x Silicone boots
• 4x Stainless steel T-bolt clamps
• 2x O-rings (CNC flange)
• 1x Intercooler outlet clip

Product Description

The Wehrli WCF100718-GW Stage 1 High Flow Bundle Kit is a premium performance upgrade for **2017-2019 Chevrolet Silverado and GMC Sierra 2500HD/3500HD** trucks powered by the **6.6L L5P Duramax** diesel engine. This kit replaces the restrictive factory intercooler plumbing with heavy-duty mandrel-bent aluminum pipes - a 3" hot-side and 3.5" cold-side - to significantly improve airflow between the turbo and engine. The CNC machined flange with double O-rings and upgraded silicone boots create a more reliable, boost-leak-resistant system compared to stock components.

Finished in Gloss White powder coat for a clean, custom look, the WCF100718-GW installs using existing factory connection points and sensors without requiring ECU tuning or additional modifications. Stainless steel T-bolt clamps and quality hardware are included for secure connections capable of handling higher boost pressures. This Stage 1 bundle kit offers Duramax owners both functional airflow improvements for throttle response and turbo efficiency, as well as a unique visual upgrade under the hood.