![Speedmaster® 1-147-078 Oldsmobile 400 425 455 MID-AIR‚Ñ¢ MidRise Air Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-078/1-147-078.jpg?resizeid=215&resizeh=600&resizew=600)
![Speedmaster® 1-147-078 Oldsmobile 400 425 455 MID-AIR‚Ñ¢ MidRise Air Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-078/1-147-078_A.jpg?resizeid=215&resizeh=600&resizew=600)
![Speedmaster® 1-147-078 Oldsmobile 400 425 455 MID-AIR‚Ñ¢ MidRise Air Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-078/1-147-078_B.jpg?resizeid=215&resizeh=600&resizew=600)
![Speedmaster® 1-147-078 Oldsmobile 400 425 455 MID-AIR‚Ñ¢ MidRise Air Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-078/1-147-078_C.jpg?resizeid=215&resizeh=600&resizew=600)
Oldsmobile 400 425 455 MID-AIR‚Ñ¢ MidRise Air Aluminum Intake Manifold [Black]
Overview
The Speedmaster MID-AIR design features the identical plenum and runner design as the normal mid-rise. The main difference is that there is an open area under the plenum chamber. This feature is sometimes called an air gap design. The air flowing under the plenum provides a cooler charge for the incoming air with less heat transfer from the engine. This cooler air charge provides additional power and torque.
Specs
| Brand: | Speedmaster |
| Part Number: | 1-147-078 |
| Part Type: | Intake Manifold, Carbureted |
| Product Line: | MidRise Air |
| Engine Block Style: | Stock/OEM standard deck |
| Carburetor Quantity: | One |
| Intake Style: | Single plane with divider |
| Basic Operating RPM Range: | 1,500-6,500 |
| Intake Manifold Height: | 6.500 in. |
| Intake Material: | Aluminum |
| Intake Finish: | Black |
| EGR: | No |
| Quantity: | Sold individually. |
| Notes: | Manifold is 1.25 in. taller than stock. |
Description
NOTE: Hood clearance must be checked as this manifold is approximately 1.25" taller than a similar stock intake manifold.
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.