Wehrli

Wehrli 20-24 Chevrolet 6.6L LP5 Duramax 4in Intake Kit Stage 2 - Gloss Black - WCF100684-GB

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SKU:
WCFWCF100684-GB
UPC:
WCF100684-GB
MPN:
WCF100684-GB
Availability:
Regularly stocked product
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MSRP: $859.00
$833.23
— You save $25.77
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Description

What is the performance benefit of the Wehrli WCF Intake Kit - Stage 2?
This cold air intake system delivers a noticeable surge in power and throttle response by maximizing airflow through its large diameter pipe and high-flow design.

How easy is the Wehrli WCF Intake Kit - Stage 2 to install?
Achieve significant horsepower and torque gains with a simple bolt-on installation, featuring quality clamps and boots for a secure and straightforward setup.

The Wehrli WCF Intake Kit - Stage 2 is engineered for enhanced engine performance in Silverado and Sierra HD trucks, boasting a massive 4 inch diameter intake pipe for significant gains. Its high-flow fabricated aluminum intake pipe and air box enclosure ensure a robust, long-lasting cold air intake system. Experience peak performance and efficiency with this premium cold air intake.

What Owners Say

Diesel enthusiasts consistently praise Wehrli intake components for delivering measurable performance gains, with owners reporting improved throttle response, better power delivery, and modest fuel economy improvements when paired with complementary upgrades like boost tubes and quality cold air intakes. The Stage 2 kit earns particular recognition for fitment quality and its role in comprehensive airflow packages on Duramax and Cummins platforms. Some users note that maximizing results often requires pairing with tuning or other bolt-ons rather than running the intake alone, which can temper expectations for standalone installation. Across truck forums and enthusiast communities, Wehrli Fabrication has established a solid reputation for well-engineered intake solutions that deliver real-world improvements when integrated into thoughtful build strategies.

Key Features

  • High flow fabricated aluminum intake pipe and air box enclosure
  • dry filter assembly
  • All aluminum construction
  • large diameter 4 piping
  • High Quality Silicone Boot
  • Stainless Steel T-Bolt Clamps

Why Choose the WCF Intake Kit - Stage 2

Delivers maximum airflow for a noticeable surge in power and throttle response.

Achieves cooler engine temperatures, unlocking peak performance and efficiency.

Provides a robust, long-lasting intake system built for extreme conditions.

Transforms your truck's engine note with a deep, aggressive intake sound.

Who Is This For?

Street Performance — 8/10
Large diameter pipe and high flow design for gains.

Engine Performance — 9/10
Fabricated aluminum pipe and dry filter enhance airflow.

Easy DIY Install — 7/10
Bolt-on install type with quality clamps and boot.

Visual Aesthetic Upgrade — 6/10
All aluminum construction offers a premium look.

Heavy Towing — 7/10
Improved airflow can support engine under load.

Drag Racing — 8/10
Massive pipe diameter and high flow for power.

Frequently Asked Questions

Will the Wehrli WCF Intake Kit - Stage 2 fit my vehicle?

Direct fitment is confirmed for 2020-2025 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD models. This bolt-on kit is engineered specifically for these heavy-duty trucks. You can install with confidence knowing it's designed for your exact application.

How difficult is the Wehrli WCF Intake Kit - Stage 2 installation?

Installation is a straightforward bolt-on process, designed for ease of application. This kit scores a 7 out of 10 for Easy DIY Install, utilizing quality clamps and silicone boots. Enjoy enhanced performance without complex procedures.

What performance improvement does the WCF Intake Kit - Stage 2 provide over stock?

Significant performance gains are delivered through a massive 4-inch diameter intake pipe and high-flow design. This achieves a score of 8 for Street Performance and 9 for Engine Performance in the usage matrix. Experience a noticeable surge in power and throttle response.

Is the Wehrli WCF Intake Kit - Stage 2 worth upgrading from OEM?

Upgrading from the OEM system is highly recommended for unlocking peak engine performance and efficiency. The high-flow fabricated aluminum intake pipe and dry filter assembly dramatically improve airflow over stock components. Achieve cooler engine temperatures for sustained power delivery.

What are the primary materials used in the Wehrli WCF Intake Kit - Stage 2?

The WCF Intake Kit - Stage 2 features an all-aluminum construction for both the high-flow fabricated intake pipe and the air box enclosure. This robust design ensures a long-lasting and premium intake system built for extreme conditions. Enjoy the durability and aesthetic appeal of aluminum.

Additional Resources

Official Wehrli Product Page

Important Notices

⚠️ CARB Notice: This product is NOT legal for street use in California under CARB (California Air Resources Board) regulations. For off-road or race use only.

⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

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Warranty Information

This Part Fits:

YearMakeModelSubmodel
2021-2025ChevroletSilverado 2500 HDCustom
2020-2025ChevroletSilverado 2500 HDHigh Country
2020-2025ChevroletSilverado 2500 HDLT
2020-2025ChevroletSilverado 2500 HDLTZ
2020-2025ChevroletSilverado 2500 HDWT
2024-2025ChevroletSilverado 2500 HDZR2
2020-2025ChevroletSilverado 3500 HDHigh Country
2020-2025ChevroletSilverado 3500 HDLT
2020-2025ChevroletSilverado 3500 HDLTZ
2020-2025ChevroletSilverado 3500 HDWT
2020-2025GMCSierra 2500 HDAT4
2024-2025GMCSierra 2500 HDAT4X
2020-2021GMCSierra 2500 HDBase
2020-2025GMCSierra 2500 HDDenali
2024-2025GMCSierra 2500 HDDenali Ultimate
2022-2025GMCSierra 2500 HDPro
2020-2025GMCSierra 2500 HDSLE
2020-2025GMCSierra 2500 HDSLT
2020-2025GMCSierra 3500 HDAT4
2020-2021GMCSierra 3500 HDBase
2020-2025GMCSierra 3500 HDDenali
2024-2025GMCSierra 3500 HDDenali Ultimate
2022-2025GMCSierra 3500 HDPro
2020-2025GMCSierra 3500 HDSLE
2020-2025GMCSierra 3500 HDSLT
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Additional Information

CARB:
This product is not CARB Legal and not for sale in California
Case Lot Quantity:
1
Category:
Air Intake Systems>Cold Air Intakes
Clearance Item:
N
MPN:
WCF100684-GB
Proposition 65:
Y
Install Type:
Bolt-On
Product Level:
Premium Performance
Street Performance:
8/10
Engine Performance:
9/10
Easy DIY Install:
7/10
Visual Aesthetic Upgrade:
6/10
Heavy Towing:
7/10
Drag Racing:
8/10
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