Holley Single-Stage Power Valve - Standard Flow
The Holley 125-75 is a precision-engineered single-stage power valve designed for optimal performance in Holley carburetors. This standard flow power valve operates at 7.5 inches of mercury (Hg) opening vacuum, making it ideal for engines with specific vacuum characteristics.
Key Features
- Single-Stage Design: Provides reliable fuel enrichment control for consistent performance
- Standard Flow Rate: Optimized for most street and performance applications
- 7.5" Hg Opening Vacuum: Precisely calibrated to activate at the correct vacuum level
- Factory Part Quality: Genuine Holley component ensuring perfect fit and function
- Complete Kit: Includes power valve and gasket for proper installation
Compatibility
Fits Holley Carburetor models 2300, 4150, 4160 & 4500
Technical Specifications
- Opening Vacuum: 7.5 inches Hg
- Flow Type: Standard flow
- Stage: Single-stage operation
- Includes: Power valve and installation gasket
About Power Valves
Power valves are critical components in Holley's power enrichment circuit. They use engine vacuum to control opening and closing rates, supplying additional fuel to the main system during heavy load or full power situations. This eliminates hesitation and bogging while ensuring smooth power delivery without drivability concerns.
Emissions Compliance
This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.