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GM Genuine Parts Exhaust Manifolds are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These manifolds help direct exhaust away from your vehicle’s engine combustion chamber. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm –
exhaust-manifold;manifold;exhaust
| Brand |
ACDelco |
|---|---|
| Part Number (MPN) |
12631812 |
| SKU |
12631812 |
| UPC / GTIN |
193468073485 / 00193468073485 |
| Condition |
New |
| Position |
Left |
| Other Names |
12631812 |
| Collector Port Diameter |
2.57 |
| Features & Benefits – Bullet 1 |
Helps direct exhaust away from your vehicle’s engine combustion chamber |
| Features & Benefits – Bullet 2 |
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE) |
| Features & Benefits – Bullet 3 |
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors |
| Features & Benefits – Bullet 4 |
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle |
| Features & Benefits – Bullet 5 |
GM regularly updates production and service part designs to integrate new materials and technologies |
| Gasket Or Seal Included |
No |
| Grade Type |
Regular |
| Height (in) |
9.2 |
| Length (in) |
17.3 |
| Material |
Cast Iron |
| Mounting Hole Quantity |
4 |
| Oxygen Sensor Port |
No |
| Port Shape |
Oval |
| Programming Required |
No |
| Weight (lb) |
8.42 |
| Width (in) |
10.2 |
| Year |
2020 |
| Make |
Chevrolet |
| Model |
Express 2500 |
| Body & Trim |
Base |
| Engine & Transmission |
4.3L V6 – Flex |
| GM |
12631812 |
Vehicle Fitment
| Year | Make | Model | Body & Trim | Engine & Transmission |
|---|---|---|---|---|
| 2018 | Chevrolet | Express 2500 | Base | 4.3L V6 – Flex |
| 2018 | Chevrolet | Express 2500 | Base | 4.3L V6 – Gas |
| 2018 | Chevrolet | Express 2500 | LS | 4.3L V6 – Flex |
| 2018 | Chevrolet | Express 2500 | LS | 4.3L V6 – Gas |
| 2019 | Chevrolet | Express 2500 | Base | 4.3L V6 – Flex |
| 2019 | Chevrolet | Express 2500 | Base | 4.3L V6 – Gas |
| 2019 | Chevrolet | Express 2500 | LS | 4.3L V6 – Flex |
| 2020 | Chevrolet | Express 2500 | Base | 4.3L V6 – Flex |
| 2020 | Chevrolet | Express 2500 | Base | 4.3L V6 – Gas |
| 2020 | Chevrolet | Express 2500 | LS | 4.3L V6 – Flex |
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