Speedmaster®
Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin]
Product Information
Specs
| Brand: | Speedmaster |
| Part Number: | 1-147-076 |
| 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: | Natural |
| EGR: | No |
| Quantity: | Sold individually. |
| Notes: | Manifold is 1.25 in. taller than stock. |
Description
This is the only available high rise high performance single plane with divider manifold for this engine. It is an inch and a quarter taller than competitive manifolds thereby producing more power. The MidRise air design provides an air gap under the plenum chamber which helps cool the intake charge providing additional power. Available with machined injector bosses.
NOTE: Hood clearance must be checked as this manifold is approximately 1.25" taller than a similar stock intake manifold.





Warranty Information
Prop 65 Warning
Installation Guide
Our AI assistant generates a step-by-step guide for this product — covering installation, maintenance, and troubleshooting.
This AI-generated guide is for general reference only and does not constitute official Speedmaster product documentation. Always verify fitment, torque specifications, and safety requirements before installation.
![Speedmaster® 1-147-076 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin]](https://s3-us-west-1.amazonaws.com/product-arena/Speedmaster/1-147%20Intake%20Manifolds,%20Carbureted/1-147-076/1-147-076.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® 1-147-076 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin]](https://s3-us-west-1.amazonaws.com/product-arena/Speedmaster/1-147%20Intake%20Manifolds,%20Carbureted/1-147-076/1-147-076_A.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® 1-147-076 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin]](https://s3-us-west-1.amazonaws.com/product-arena/Speedmaster/1-147%20Intake%20Manifolds,%20Carbureted/1-147-076/1-147-076_B.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® 1-147-076 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin]](https://s3-us-west-1.amazonaws.com/product-arena/Speedmaster/1-147%20Intake%20Manifolds,%20Carbureted/1-147-076/1-147-076_C.jpg?resizeid=224&resizeh=600&resizew=600)