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Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
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Wehrli
WCFab Wehrli Stage 2 4in Intake Kit for 2020-2025 Chevrolet/GMC 2500/3500 HD (6.6L) - Red
This product will be available for sale in 2 weeks, but you can pre-order now to receive 10% discount!
Fits select 2020-2025 Chevrolet Silverado and GMC Sierra 2500 HD / 3500 HD models (6.6L L5P Duramax).
The WCFab Stage 2 4-inch intake kit replaces the restrictive plastic factory intake components with high-flow fabricated aluminum parts. Designed specifically for the L5P Duramax, this kit features a 10-gauge aluminum sheet air box and lid that seals to the functional hood ram air port and inner fender to draw in cooler, denser air. The oversized 4-inch intake horn is more than one inch larger than the OEM diameter, eliminating the significant restriction found at the factory turbo inlet.
This bolt-on assembly improves intake air velocity and volume, resulting in quicker throttle response and more aggressive turbo sound without the need for an aftermarket tune. Each kit is finished in a durable custom red powder coat and includes a dry air filter with an Outerwears pre-filter cover for maximum protection and maintenance-free performance.
- Replaces GM Part Numbers: 84841229, 84841225, 84262962, 85614333, 84554702
- Fabricated 10G aluminum air box and lid
- Mandrel-bent 4-inch aluminum intake pipe
- High-flow 4-inch intake horn removes turbo inlet restriction
- Dry air filter with Outerwears pre-filter cover
- Heavy-duty silicone boot and stainless steel T-bolt clamps
- No tuning required; direct bolt-on installation
- Made in the USA
- Manufacturer Part Number: WCF100684-RED
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2025 | Chevrolet | Silverado 2500 HD | Custom |
| 2020-2025 | Chevrolet | Silverado 2500 HD | High Country |
| 2020-2025 | Chevrolet | Silverado 2500 HD | LT |
| 2020-2025 | Chevrolet | Silverado 2500 HD | LTZ |
| 2020-2025 | Chevrolet | Silverado 2500 HD | WT |
| 2024-2025 | Chevrolet | Silverado 2500 HD | ZR2 |
| 2020-2025 | Chevrolet | Silverado 3500 HD | High Country |
| 2020-2025 | Chevrolet | Silverado 3500 HD | LT |
| 2020-2025 | Chevrolet | Silverado 3500 HD | LTZ |
| 2020-2025 | Chevrolet | Silverado 3500 HD | WT |
| 2020-2025 | GMC | Sierra 2500 HD | AT4 |
| 2024-2025 | GMC | Sierra 2500 HD | AT4X |
| 2020-2021 | GMC | Sierra 2500 HD | Base |
| 2020-2025 | GMC | Sierra 2500 HD | Denali |
| 2024-2025 | GMC | Sierra 2500 HD | Denali Ultimate |
| 2022-2025 | GMC | Sierra 2500 HD | Pro |
| 2020-2025 | GMC | Sierra 2500 HD | SLE |
| 2020-2025 | GMC | Sierra 2500 HD | SLT |
| 2020-2025 | GMC | Sierra 3500 HD | AT4 |
| 2020-2021 | GMC | Sierra 3500 HD | Base |
| 2020-2025 | GMC | Sierra 3500 HD | Denali |
| 2024-2025 | GMC | Sierra 3500 HD | Denali Ultimate |
| 2022-2025 | GMC | Sierra 3500 HD | Pro |
| 2020-2025 | GMC | Sierra 3500 HD | SLE |
| 2020-2025 | GMC | Sierra 3500 HD | SLT |
Choose your Location
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Atlus
1340 Cobb Dr, Unit 1, Eustis, FL 32736
352-234-4458
Mon – Fri: 8:30 am – 4:30 pm
Sat: 9:00 am – 2:00 pm
Sun: Closed
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The Atlus Price Guarantee
If you can find the part for a lower price from an authorized dealer/shop, we'll match the price! Reach out to Hello@AtlusAuto.com, our live chat located at the bottom right of your screen, or request an Atlas Price Guarantee, or visit our dedicated APG page to submit a request.
WCFab Wehrli Stage 2 4in Intake Kit for 2020-2025 Chevrolet/GMC 2500/3500 HD (6.6L) - Red
This product will be available soon, but you can pre-order now to get on the list before others!
US Based Support - In Florida
30 Days Satisfaction Guarantee
Price Match
If you can find the part for a lower price from an authorized dealer/shop, we'll match the price! Reach out to Hello@AtlusAuto.com, our live chat located at the bottom of your screen, or request an Atlas Price Guarantee, or visit our dedicated APG page to submit a request.
Easy Financing
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Why use Affirm/Shop?
- Clear application process
- Friendly support team
- Spread a big payment interest-free
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How does it work?
- Add your purchase to cart
- Select Shop Payments at checkout
- Complete the application
- Compare any available finance options
Share:
Fits select 2020-2025 Chevrolet Silverado and GMC Sierra 2500 HD / 3500 HD models (6.6L L5P Duramax).
The WCFab Stage 2 4-inch intake kit replaces the restrictive plastic factory intake components with high-flow fabricated aluminum parts. Designed specifically for the L5P Duramax, this kit features a 10-gauge aluminum sheet air box and lid that seals to the functional hood ram air port and inner fender to draw in cooler, denser air. The oversized 4-inch intake horn is more than one inch larger than the OEM diameter, eliminating the significant restriction found at the factory turbo inlet.
This bolt-on assembly improves intake air velocity and volume, resulting in quicker throttle response and more aggressive turbo sound without the need for an aftermarket tune. Each kit is finished in a durable custom red powder coat and includes a dry air filter with an Outerwears pre-filter cover for maximum protection and maintenance-free performance.
- Replaces GM Part Numbers: 84841229, 84841225, 84262962, 85614333, 84554702
- Fabricated 10G aluminum air box and lid
- Mandrel-bent 4-inch aluminum intake pipe
- High-flow 4-inch intake horn removes turbo inlet restriction
- Dry air filter with Outerwears pre-filter cover
- Heavy-duty silicone boot and stainless steel T-bolt clamps
- No tuning required; direct bolt-on installation
- Made in the USA
- Manufacturer Part Number: WCF100684-RED
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2025 | Chevrolet | Silverado 2500 HD | Custom |
| 2020-2025 | Chevrolet | Silverado 2500 HD | High Country |
| 2020-2025 | Chevrolet | Silverado 2500 HD | LT |
| 2020-2025 | Chevrolet | Silverado 2500 HD | LTZ |
| 2020-2025 | Chevrolet | Silverado 2500 HD | WT |
| 2024-2025 | Chevrolet | Silverado 2500 HD | ZR2 |
| 2020-2025 | Chevrolet | Silverado 3500 HD | High Country |
| 2020-2025 | Chevrolet | Silverado 3500 HD | LT |
| 2020-2025 | Chevrolet | Silverado 3500 HD | LTZ |
| 2020-2025 | Chevrolet | Silverado 3500 HD | WT |
| 2020-2025 | GMC | Sierra 2500 HD | AT4 |
| 2024-2025 | GMC | Sierra 2500 HD | AT4X |
| 2020-2021 | GMC | Sierra 2500 HD | Base |
| 2020-2025 | GMC | Sierra 2500 HD | Denali |
| 2024-2025 | GMC | Sierra 2500 HD | Denali Ultimate |
| 2022-2025 | GMC | Sierra 2500 HD | Pro |
| 2020-2025 | GMC | Sierra 2500 HD | SLE |
| 2020-2025 | GMC | Sierra 2500 HD | SLT |
| 2020-2025 | GMC | Sierra 3500 HD | AT4 |
| 2020-2021 | GMC | Sierra 3500 HD | Base |
| 2020-2025 | GMC | Sierra 3500 HD | Denali |
| 2024-2025 | GMC | Sierra 3500 HD | Denali Ultimate |
| 2022-2025 | GMC | Sierra 3500 HD | Pro |
| 2020-2025 | GMC | Sierra 3500 HD | SLE |
| 2020-2025 | GMC | Sierra 3500 HD | SLT |
Authencity Guaranteed
We only sell authentic products from verified brand partners and retail partners globally.
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