AED's 2.5 Power Valve is a high-flow, single-stage design that opens at 2.5 in. Hg of vacuum, richening the fuel mixture under load for improved power delivery on a Holley carburetor.
Specifications:
- Opens at 2.5 in. Hg of vacuum
- High-flow, single-stage design
- Gasket included
- Fits Holley carburetors
- Part Number: 5025
FAQ
At what vacuum does this power valve open?
It opens at 2.5 in. Hg of vacuum.
What does a power valve do?
A power valve adds extra fuel to the carburetor's circuit when engine vacuum drops under load, richening the mixture for more power.
How do I choose the correct power valve rating?
Select a power valve rated below the engine's lowest in-gear idle vacuum reading; choosing one rated too high can cause the valve to open at idle.
Is a gasket included?
Yes, a gasket is included for installation.

