(Ford F-150 1975-79, 1984-87, Mustang 1964-73, 1983-85, F-250 1955-66, 1973-79, 1983-87, Thunderbird 1955-76, F-350 1955-66, 1973-79, 1983-87 + 423 more models)
Manufacturer
Part Number
$17.95
In Stock (10+)
Usually delivered within 2 days
Add To Cart
Check out with
No Hassle Returns
Live-in-stock inventory
Fitment guaranteed
The Edelbrock 12665 is a single-stage power valve calibrated to open at 6.5 inches of mercury (Hg) vacuum. This precision-engineered component is designed to optimize fuel delivery in Edelbrock and compatible carburetors by responding to changes in engine vacuum conditions.
How It Works:
Power valves use engine vacuum as a signal to regulate fuel flow to the main metering system. Under normal cruising conditions with high vacuum, the valve remains closed. When the engine is under heavy load, acceleration, or wide-open throttle—conditions that cause vacuum to drop—the power valve opens at its calibrated threshold (6.5" Hg) to supply additional fuel through the main jets. This enrichment prevents lean conditions that cause hesitation, stumbling, or power loss.
Key Features:
Applications:
This power valve is commonly used in Edelbrock Performer, Thunder, and AVS series carburetors. The 6.5" Hg rating is a popular calibration suitable for many street performance and mild racing applications. Selecting the correct power valve rating based on your engine's vacuum characteristics is essential for proper air-fuel ratio management and optimal performance.
Ford F-150 1975-79, 1984-87, Mustang 1964-73, 1983-85, F-250 1955-66, 1973-79, 1983-87, Thunderbird 1955-76, F-350 1955-66, 1973-79, 1983-87, Galaxie 500 1962-74, F-100 1955-66, 1973-76, 1979, Fairlane 1955-70, Torino 1968-76 + 419 more models
Sold individually
6.5 in. Hg
Standard Flow
Single
WARNING: This product can expose you to Chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.
Yes
On time, good price, got what I paid for
Alex M
Comment
Laura C
Great parts and delivery time.
Matthew S
Good so far I just hope it'll be the right part when it gets here
Michael S
Good price and easy checkout
Alan E
Very simple and easy to navigate
Dyann L
Ordered what I needed on line and it was delivered in a timely fashion, thank you!
gary c
Add your review
Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy
