Single–Stage Power Valve; Standard Flow;
Holley’s single-stage standard flow power valve boosts your vehicles power when pulling heavy loads or at fast speeds. By enhancing the carburetors response to vacuum forces, the power valve allows an optimal amount of fuel through the carburetor for increased torque and higher speeds. The power valve also allows the carburetor to run leaner under partial-throttle, for increased fuel economy.
When selecting a power valve, a good method to use is to measure your highest partial-throttle manifold vacuum reading, divide it by two, and choose the closest size smaller. So, for example, if your vacuum reading at the manifold is 8″ Hg, you would use a 3.5″ Hg power valve.
- With Single Stage
- Include Gasket
- Limited 90 Day Warranty