Holley Power Valve 4.5in Vacuum High Flow Carburetor Component

SKU: BBVL_125-145
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About Holley Holley is the legendary American carburetor and fuel-injection ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley

Holley is the legendary American carburetor and fuel-injection brand — over 100 years of induction history. From the iconic 4150 four-barrel to today's Sniper EFI conversions, Holley remains the choice for muscle car restorations, Pro Mod, and gasser builds.

Maximize Fuel Delivery with the Holley 4.5in Vacuum High-Flow Power Valve

Optimize your Holley carburetor's response and fuel delivery under demanding conditions with this high-performance Holley 4.5in Vacuum Power Valve. This high-flow, single-stage power valve is a crucial upgrade for engines that require earlier and more aggressive fuel enrichment, typically found in modified or racing applications where engine vacuum drops rapidly. It ensures a rich fuel mixture is supplied precisely when needed, preventing lean-out and maximizing horsepower and torque during hard acceleration.

Advanced Design for Aggressive Fuel Enrichment

Holley's commitment to performance is embodied in this advanced power valve. Featuring a robust two-door design, this valve is engineered for consistent, reliable operation and a superior seal. Its 4.5-inch vacuum rating means it opens at a lower vacuum level compared to standard valves, providing earlier fuel enrichment. This characteristic is vital for high-performance engines that operate with lower manifold vacuum at idle or during rapid throttle transitions. Each power valve comes complete with a high-quality gasket, ensuring a leak-free and secure installation for immediate performance gains.

Key Features & Benefits:

  • Genuine Holley Performance: Guarantees perfect fitment and superior function in Holley carburetors.
  • 4.5in Vacuum Rating: Calibrated for earlier fuel enrichment, ideal for performance and racing engines.
  • High Flow, Single Stage: Delivers a substantial and consistent increase in fuel under load.
  • Durable Two-Door Construction: Ensures reliable sealing and long-term operational integrity.
  • Includes Installation Gasket: Provides everything needed for a quick and secure, leak-free setup.
  • Optimized for Aggressive Driving: Prevents lean conditions during rapid throttle changes and high RPMs.

Why Upgrade to a Holley High-Flow Power Valve?

For performance enthusiasts, the power valve is more than just a component; it's a tuning tool. Upgrading to a Holley 4.5in vacuum high-flow power valve can dramatically improve your engine's responsiveness and power delivery, especially in applications where a standard valve might not open soon enough. This valve ensures your engine receives the critical fuel it needs precisely when vacuum levels drop, preventing hesitation and maximizing your engine's potential. Trust in Holley's engineering excellence for your carburetor's critical components. Discover more performance upgrades at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley

Holley is the legendary American carburetor and fuel-injection brand — over 100 years of induction history. From the iconic 4150 four-barrel to today's Sniper EFI conversions, Holley remains the choice for muscle car restorations, Pro Mod, and gasser builds.

Maximize Fuel Delivery with the Holley 4.5in Vacuum High-Flow Power Valve

Optimize your Holley carburetor's response and fuel delivery under demanding conditions with this high-performance Holley 4.5in Vacuum Power Valve. This high-flow, single-stage power valve is a crucial upgrade for engines that require earlier and more aggressive fuel enrichment, typically found in modified or racing applications where engine vacuum drops rapidly. It ensures a rich fuel mixture is supplied precisely when needed, preventing lean-out and maximizing horsepower and torque during hard acceleration.

Advanced Design for Aggressive Fuel Enrichment

Holley's commitment to performance is embodied in this advanced power valve. Featuring a robust two-door design, this valve is engineered for consistent, reliable operation and a superior seal. Its 4.5-inch vacuum rating means it opens at a lower vacuum level compared to standard valves, providing earlier fuel enrichment. This characteristic is vital for high-performance engines that operate with lower manifold vacuum at idle or during rapid throttle transitions. Each power valve comes complete with a high-quality gasket, ensuring a leak-free and secure installation for immediate performance gains.

Key Features & Benefits:

  • Genuine Holley Performance: Guarantees perfect fitment and superior function in Holley carburetors.
  • 4.5in Vacuum Rating: Calibrated for earlier fuel enrichment, ideal for performance and racing engines.
  • High Flow, Single Stage: Delivers a substantial and consistent increase in fuel under load.
  • Durable Two-Door Construction: Ensures reliable sealing and long-term operational integrity.
  • Includes Installation Gasket: Provides everything needed for a quick and secure, leak-free setup.
  • Optimized for Aggressive Driving: Prevents lean conditions during rapid throttle changes and high RPMs.

Why Upgrade to a Holley High-Flow Power Valve?

For performance enthusiasts, the power valve is more than just a component; it's a tuning tool. Upgrading to a Holley 4.5in vacuum high-flow power valve can dramatically improve your engine's responsiveness and power delivery, especially in applications where a standard valve might not open soon enough. This valve ensures your engine receives the critical fuel it needs precisely when vacuum levels drop, preventing hesitation and maximizing your engine's potential. Trust in Holley's engineering excellence for your carburetor's critical components. Discover more performance upgrades at GGCRACING.

Product Details

Product Description

About Holley

Holley is the legendary American carburetor and fuel-injection brand — over 100 years of induction history. From the iconic 4150 four-barrel to today's Sniper EFI conversions, Holley remains the choice for muscle car restorations, Pro Mod, and gasser builds.

Maximize Fuel Delivery with the Holley 4.5in Vacuum High-Flow Power Valve

Optimize your Holley carburetor's response and fuel delivery under demanding conditions with this high-performance Holley 4.5in Vacuum Power Valve. This high-flow, single-stage power valve is a crucial upgrade for engines that require earlier and more aggressive fuel enrichment, typically found in modified or racing applications where engine vacuum drops rapidly. It ensures a rich fuel mixture is supplied precisely when needed, preventing lean-out and maximizing horsepower and torque during hard acceleration.

Advanced Design for Aggressive Fuel Enrichment

Holley's commitment to performance is embodied in this advanced power valve. Featuring a robust two-door design, this valve is engineered for consistent, reliable operation and a superior seal. Its 4.5-inch vacuum rating means it opens at a lower vacuum level compared to standard valves, providing earlier fuel enrichment. This characteristic is vital for high-performance engines that operate with lower manifold vacuum at idle or during rapid throttle transitions. Each power valve comes complete with a high-quality gasket, ensuring a leak-free and secure installation for immediate performance gains.

Key Features & Benefits:

  • Genuine Holley Performance: Guarantees perfect fitment and superior function in Holley carburetors.
  • 4.5in Vacuum Rating: Calibrated for earlier fuel enrichment, ideal for performance and racing engines.
  • High Flow, Single Stage: Delivers a substantial and consistent increase in fuel under load.
  • Durable Two-Door Construction: Ensures reliable sealing and long-term operational integrity.
  • Includes Installation Gasket: Provides everything needed for a quick and secure, leak-free setup.
  • Optimized for Aggressive Driving: Prevents lean conditions during rapid throttle changes and high RPMs.

Why Upgrade to a Holley High-Flow Power Valve?

For performance enthusiasts, the power valve is more than just a component; it's a tuning tool. Upgrading to a Holley 4.5in vacuum high-flow power valve can dramatically improve your engine's responsiveness and power delivery, especially in applications where a standard valve might not open soon enough. This valve ensures your engine receives the critical fuel it needs precisely when vacuum levels drop, preventing hesitation and maximizing your engine's potential. Trust in Holley's engineering excellence for your carburetor's critical components. Discover more performance upgrades at GGCRACING.

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