![Speedmaster® 1-147-020 Chevy BBC 454 Oval Port MidRise Air Aluminum Intake Manifold [Polished]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-020/1-147-020.jpg?resizeid=215&resizeh=600&resizew=600)
![Speedmaster® 1-147-020 Chevy BBC 454 Oval Port MidRise Air Aluminum Intake Manifold [Polished]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-020/1-147-020_A.jpg?resizeid=215&resizeh=600&resizew=600)
![Speedmaster® 1-147-020 Chevy BBC 454 Oval Port MidRise Air Aluminum Intake Manifold [Polished]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-020/1-147-020_B.jpg?resizeid=215&resizeh=600&resizew=600)
![Speedmaster® 1-147-020 Chevy BBC 454 Oval Port MidRise Air Aluminum Intake Manifold [Polished]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-020/1-147-020_C.jpg?resizeid=215&resizeh=600&resizew=600)
Chevy BBC 454 Oval Port MidRise Air Aluminum Intake Manifold [Polished]
Specs
| Brand: | Speedmaster |
| Part Number: | 1-147-020 |
| 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: | 4.650 in. |
| Intake Material: | Aluminum |
| Intake Finish: | Machine Polished |
| EGR: | No |
| Quantity: | Sold individually. |
| Notes: | Check hood clearance before installing. Will not fit stock Corvette hoods. Not for tall deck applications. |
Description
The Speedmaster MidRise Air design features the identical plenum and runner design as the normal MidRise. 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.
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Ratings & Reviews
1 Review
Best intake I ever had
Paul| 04/09/2022 6:56 pm
Very responsive on my big block