
Vehicle Specific
Check if it fits by entering your vehicle info| Brand | Dorman | 
| Part Number | 674-731 | 
| Part Description | Cast Iron Natural Exhaust Manifold | 
| Finish | Natural | 
| Flange Bolt Hole Quantity | 0 | 
| Flange Stud Hole Quantity | 3 | 
| Gasket or Seal Included | Yes | 
| Header Material | Cast Iron | 
| Heat Shield Included | No | 
| Inlet Port Shape | Square | 
| Installation Hardware Included | Yes | 
| Item Grade | Regular | 
| Manifold Bolt Hole Quantity | 8 | 
| UPC | 019495212935 | 
| OE Part Number | 12624684, 12637647, 97224587 | 
| Package Quantity | 1 | 
| Position | Driver Side | 
| Year Make Model | Trim | Engine | 
|---|---|---|
| 2006-2016 Chevrolet Express 2500 | All Trims | 8 Cyl 6.6L | 
| 2006-2016 Chevrolet Express 3500 | All Trims | 8 Cyl 6.6L | 
| 2001-2016 Chevrolet Silverado 2500 HD | All Trims | 8 Cyl 6.6L | 
| 2007 Chevrolet Silverado 2500 HD Classic | All Trims | 8 Cyl 6.6L | 
| 2001-2006 Chevrolet Silverado 3500 | All Trims | 8 Cyl 6.6L | 
| 2007 Chevrolet Silverado 3500 Classic | All Trims | 8 Cyl 6.6L | 
| 2007-2016 Chevrolet Silverado 3500 HD | All Trims | 8 Cyl 6.6L | 
| 2006-2016 GMC Savana 2500 | All Trims | 8 Cyl 6.6L | 
| 2006-2016 GMC Savana 3500 | All Trims | 8 Cyl 6.6L | 
| 2001-2016 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.6L |