The Quick Fuel 25-105QFT power valve assembly is rated 10.5. The rating denotes the manifold vacuum opening point in inches of mercury.
- Power valve rating: 10.5
- Type: power valve assembly
FAQ
What does the 10.5 rating mean?
It is the manifold vacuum opening point of the power valve, measured in inches of mercury.
What carburetors does it fit?
It is a replacement power valve for QFT and Holley-style carburetors.
How do I choose a rating?
Match the rating to your engine's manifold vacuum so the valve opens at the correct point.

