Speedmaster®
Oldsmobile 400 425 455 LowRise Aluminum Intake Manifold [Black]
![Speedmaster® 1-147-099 Oldsmobile 400 425 455 LowRise Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-099/1-147-099.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® 1-147-099 Oldsmobile 400 425 455 LowRise Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-099/1-147-099_A.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® 1-147-099 Oldsmobile 400 425 455 LowRise Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-099/1-147-099_B.jpg?resizeid=224&resizeh=600&resizew=600)
![Speedmaster® 1-147-099 Oldsmobile 400 425 455 LowRise Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-099/1-147-099_C.jpg?resizeid=224&resizeh=600&resizew=600)
Product Information
Overview
The Speedmaster LowRise Manifolds are our lowest profile manifold and is also the only one that is street legal on pollution controlled vehicles. It is set up to accept a spread bore carb.
Specs
| Brand: | Speedmaster |
| Part Number: | 1-147-099 |
| Part Type: | Intake Manifold, Carbureted |
| Product Line: | LowRise |
| Engine Block Style: | Stock/OEM standard deck |
| Carburetor Quantity: | One |
| Intake Style: | Single Plane |
| Basic Operating RPM Range: | 4,500-7,500 RPM |
| Intake Manifold Height (in.): | 8.200 in. |
| Intake Material: | Aluminum |
| Intake Finish: | Black |
| EGR: | No |
| Quantity: | Sold individually. |
| Notes: | Check hood clearance before installing. Will not fit stock corvette hoods. Not for tall deck applications. |
Description
Warranty Information
12-Month Limited Worldwide Warranty
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
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.