Wehrli

Wehrli 20-24 Chevrolet 6.6L LP5 Duramax 4in Intake Kit Stage 2 - Red - WCF100684-RED

(No reviews yet) Write a Review
SKU:
WCFWCF100684-RED
UPC:
WCF100684-RED
MPN:
WCF100684-RED
Availability:
Regularly stocked product
  • Photo - Primary
  • User 1
  • User 1
  • User 2
  • Logo Image
MSRP: $905.98
$880.80
— You save $25.18
Current Stock: 2

Sold Out

Frequently bought together:

Description

What is the primary benefit of upgrading to a performance cold air intake?
A high-flow cold air intake system delivers maximum airflow for a noticeable boost in power and improved throttle response.

Is this cold air intake kit difficult to install?
Bolt-on installation makes this cold air intake kit straightforward, replacing specific GM part numbers for a secure fit.

The Wehrli WCF Intake Kit Stage 2 for 2020-2025 Silverado/Sierra HD trucks delivers a significant increase in horsepower and torque, backed by an 8/10 rating for street performance. Its high-flow, fabricated aluminum 4 inch piping and sealed air box enclosure provide superior engine cooling and protection. Experience unrestricted airflow and enhanced engine performance with this premium cold air intake upgrade.

What Owners Say

Owners and enthusiasts consistently highlight the Wehrli intake system as a proven upgrade that delivers measurable improvements in throttle response and overall power. The Stage 2 kit earns particular praise when paired with quality filters and complementary upgrades like boost tubes, with users reporting noticeable performance gains and better driveability. Some diesel owners note that intake upgrades generally produce modest MPG improvements rather than dramatic fuel savings, and a few mention minimal changes in turbo sound compared to expectations. The consensus remains strong that Wehrli Fabrication products represent quality engineering worth the investment for serious enthusiasts seeking reliable bolt-on performance enhancements for their diesel platforms.

Key Features

  • High flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly
  • All aluminum construction features large diameter 4 inch piping with smooth aerodynamic bends
  • High Quality Silicone Boot & Stainless Steel T-Bolt Clamps Seal
  • Replaces the following GM Part Numbers: 84841229, 84841225, 84262962, 85614333, 84554702

Why Choose the WCF Intake Kit - Stage 2

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

Achieves superior engine cooling and protection with a sealed, aerodynamic airbox.

Provides a secure, leak-free connection for consistent, optimal engine performance.

Transforms your truck's intake system for a more aggressive, powerful driving feel.

Who Is This For?

Street Performance — 8/10
High flow intake pipe and enclosure for unrestricted airflow.

Engine Performance — 9/10
Fabricated aluminum pipe and dry filter increase horsepower and torque.

Easy DIY Install — 7/10
Bolt-on installation replaces specific GM part numbers.

Visual Aesthetic Upgrade — 6/10
Fabricated aluminum construction offers a premium appearance.

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

Racing Competition — 8/10
High flow and performance claim support racing applications.

Vehicle Compatibility

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

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.

Browse More: Shop All Cold Air Intakes — Air Intake Systems

You Might Also Need

ADD Intercooler Upgrade Kits

Addictive Desert Designs | $1499.99

ADD Intercooler Upgrade Kits

Addictive Desert Designs | $1499.99

View AllClose

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
View AllClose

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-RED
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
Racing Competition:
8/10
View AllClose

Related Products

Related Products