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.
EXHAUST MANIFOLD KIT
Exhaust, Manifold, Manifolds
Exhaust Header
| Brand |
Dorman |
|---|---|
| Part Number (MPN) |
674-425 |
| SKU |
674-425 |
| UPC / GTIN |
194883186231 / 00194883186231 |
| Condition |
New |
| Position |
Left |
| Collector Port Diameter |
3 |
| Gasket Or Seal Included |
Yes |
| Grade Type |
Standard Replacement |
| Heat Shield Included |
Yes |
| Material |
Cast Iron |
| Mounting Hardware Included |
No |
| Mounting Hole Quantity |
8 |
| Oxygen Sensor Port |
Yes |
| Package Contents |
1 Manifold |
| Port Shape |
Round |
| Tube Wall Thickness |
0.125 |
| Year |
2020 |
| Make |
Chevrolet |
| Model |
Express 2500 |
| Body & Trim |
Base |
| Engine & Transmission |
4.3L V6 – Flex |
| General Motors |
12631812 |
Vehicle Fitment