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![Speedmaster® 1-147-021 Chevy BBC 454 Oval Port MidRise Air Aluminum Intake Manifold [Black]](https://product-arena.s3.us-west-1.amazonaws.com/Speedmaster/1-147%20Intake%20Manifolds%2C%20Carbureted/1-147-021/1-147-021_A.jpg?resizeid=215&resizeh=600&resizew=600)
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Chevy BBC 454 Oval Port MidRise Air Aluminum Intake Manifold [Black]
Overview
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.
Specs
| Brand: | Speedmaster |
| Part Number: | 1-147-021 |
| Part Type: | Intake Manifold, Carbureted |
| Product Line: | MidRise Air |
| Engine Block Style: | Stock/OEM standard deck |
| Carburetor Quantity: | One |
| Carburetor Mounting Pattern: | Square Bore |
| 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: | Satin |
| EGR: | No |
| Quantity: | Sold individually. |
| Notes: | Check hood clearance before installing. Will not fit stock Corvette hoods. Not for tall deck applications. |
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.