Dorman 674-731 Left Exhaust Manifold 01-16 Chevy Silverado GMC Sierra 12637647
Confirm Fitment Before You Buy
Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price
$91.62
Select your vehicle at the top of the page to check fitment.
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Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.
This exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. It includes all necessary gaskets and downpipe hardware for a complete repair.
- Ideal replacement - this exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the stock manifold on specified vehicles
- Reliable construction - durable materials resist warping, cracking and leaking for long-lasting performance
- Complete repair - includes all necessary gaskets and downpipe hardware
- Trustworthy design - built by industry leader in aftermarket manifolds
Vehicle Fitment
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2006-2016 | Chevrolet | Express 2500 | Left | 6.6L V8 |
| 2006-2016 | Chevrolet | Express 3500 | Left | 6.6L V8 |
| 2009-2016 | Chevrolet | Express 4500 | Left | 6.6L V8 |
| 2001-2016 | Chevrolet | Silverado 2500 HD | Left | 6.6L V8 |
| 2007 | Chevrolet | Silverado 2500 HD Classic | Left | 6.6L V8 |
| 2001-2006 | Chevrolet | Silverado 3500 | Left | 6.6L V8 |
| 2007 | Chevrolet | Silverado 3500 Classic | Left | 6.6L V8 |
| 2007-2016 | Chevrolet | Silverado 3500 HD | Left | 6.6L V8 |
| 2006-2016 | GMC | Savana 2500 | Left | 6.6L V8 |
| 2006-2016 | GMC | Savana 3500 | Left | 6.6L V8 |
| 2009-2016 | GMC | Savana 4500 | Left | 6.6L V8 |
| 2001-2016 | GMC | Sierra 2500 HD | Left | 6.6L V8 |
| 2007 | GMC | Sierra 2500 HD Classic | Left | 6.6L V8 |
| 2001-2006 | GMC | Sierra 3500 | Left | 6.6L V8 |
| 2007 | GMC | Sierra 3500 Classic | Left | 6.6L V8 |
| 2007-2016 | GMC | Sierra 3500 HD | Left | 6.6L V8 |
| 2005-2011 | Workhorse | LF72 | Left | 6.6L V8 |
Please confirm the part number and your vehicle's year, make, model and engine before ordering. Questions? Message us with your VIN and we'll check fitment for you.
Specifications
| Brand | Dorman |
|---|---|
| Part Number | 674-731 |
| UPC | 019495212935 |
| Placement | Left |
| Material | Cast Iron |
| Color | Metallic Gray |
| Mounting Hardware Included | Yes |
| Gasket Or Seal Included | Yes |
| Port Shape | Square |
| Grade Type | Standard Replacement |
| Heat Shield Included | No |
| Package Contents | Exhaust Manifold; 1 Manifold Gasket and 1 Flange; 3 Studs; 3 Washers |
| Country of Origin | India |
| Warranty | Limited Lifetime |
OE & Interchange Numbers
| 12637647 | General Motors (OE) |
|---|---|
| 12624684 | General Motors (OE) |
| 97224587 | General Motors (OE) |
| SK674731 | Interchange |
| 663226 | Interchange |
| 24056704530728207 | Interchange |