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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
Wehrli Custom Fabrication 3in Stainless Steel Downpipe for 2015-2016 Chevrolet/GMC (6.6L) 3-Bolt Flange
This product will be available for sale in 2 weeks, but you can pre-order now to receive 10% discount!
Fits 2015-2016 Chevrolet Silverado and GMC Sierra 2500 HD / 3500 HD (6.6L LML Duramax).
The Wehrli Custom Fabrication (WCFab) 3" Stainless Steel Downpipe is designed to eliminate the restrictive, crushed factory downpipe found on 2015.5-2016 LML engines. By increasing exhaust flow directly from the turbocharger, this upgrade improves throttle response and helps maintain lower exhaust gas temperatures (EGTs). This downpipe is specifically engineered for trucks equipped with the 3-bolt flange exhaust connection and is compatible with the factory turbocharger or factory-style drop-in replacements.
- 3" diameter high-flow stainless steel construction
- Designed for 3-bolt flange exhaust connections
- Direct replacement for GM part numbers 12674630 and 12655717
- Includes high-temperature heat wrap and stainless steel clamps
- No ECM tuning required for installation
- Manufactured in the USA
- Manufacturer Part Number: WCF100704
Note: For 2011-2014 LML models with a V-band style connection, please see WCFab part number WCF100704.
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2016 | Chevrolet | Silverado 2500 HD | High Country |
| 2015-2016 | Chevrolet | Silverado 2500 HD | LT |
| 2015-2016 | Chevrolet | Silverado 2500 HD | LTZ |
| 2015-2016 | Chevrolet | Silverado 2500 HD | WT |
| 2015-2016 | Chevrolet | Silverado 3500 HD | High Country |
| 2015-2016 | Chevrolet | Silverado 3500 HD | LT |
| 2015-2016 | Chevrolet | Silverado 3500 HD | LTZ |
| 2015-2016 | Chevrolet | Silverado 3500 HD | WT |
| 2015-2016 | GMC | Sierra 2500 HD | Base |
| 2015-2016 | GMC | Sierra 2500 HD | Denali |
| 2015-2016 | GMC | Sierra 2500 HD | SLE |
| 2015-2016 | GMC | Sierra 2500 HD | SLT |
| 2015-2016 | GMC | Sierra 3500 HD | Base |
| 2015-2016 | GMC | Sierra 3500 HD | Denali |
| 2015-2016 | GMC | Sierra 3500 HD | SLE |
| 2015-2016 | GMC | Sierra 3500 HD | SLT |
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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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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.
Wehrli Custom Fabrication 3in Stainless Steel Downpipe for 2015-2016 Chevrolet/GMC (6.6L) 3-Bolt Flange
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
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Fits 2015-2016 Chevrolet Silverado and GMC Sierra 2500 HD / 3500 HD (6.6L LML Duramax).
The Wehrli Custom Fabrication (WCFab) 3" Stainless Steel Downpipe is designed to eliminate the restrictive, crushed factory downpipe found on 2015.5-2016 LML engines. By increasing exhaust flow directly from the turbocharger, this upgrade improves throttle response and helps maintain lower exhaust gas temperatures (EGTs). This downpipe is specifically engineered for trucks equipped with the 3-bolt flange exhaust connection and is compatible with the factory turbocharger or factory-style drop-in replacements.
- 3" diameter high-flow stainless steel construction
- Designed for 3-bolt flange exhaust connections
- Direct replacement for GM part numbers 12674630 and 12655717
- Includes high-temperature heat wrap and stainless steel clamps
- No ECM tuning required for installation
- Manufactured in the USA
- Manufacturer Part Number: WCF100704
Note: For 2011-2014 LML models with a V-band style connection, please see WCFab part number WCF100704.
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2016 | Chevrolet | Silverado 2500 HD | High Country |
| 2015-2016 | Chevrolet | Silverado 2500 HD | LT |
| 2015-2016 | Chevrolet | Silverado 2500 HD | LTZ |
| 2015-2016 | Chevrolet | Silverado 2500 HD | WT |
| 2015-2016 | Chevrolet | Silverado 3500 HD | High Country |
| 2015-2016 | Chevrolet | Silverado 3500 HD | LT |
| 2015-2016 | Chevrolet | Silverado 3500 HD | LTZ |
| 2015-2016 | Chevrolet | Silverado 3500 HD | WT |
| 2015-2016 | GMC | Sierra 2500 HD | Base |
| 2015-2016 | GMC | Sierra 2500 HD | Denali |
| 2015-2016 | GMC | Sierra 2500 HD | SLE |
| 2015-2016 | GMC | Sierra 2500 HD | SLT |
| 2015-2016 | GMC | Sierra 3500 HD | Base |
| 2015-2016 | GMC | Sierra 3500 HD | Denali |
| 2015-2016 | GMC | Sierra 3500 HD | SLE |
| 2015-2016 | GMC | Sierra 3500 HD | SLT |
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