Holley

Holley Main Jet Extension 1/4-32 Thread Brass — Fits Holley 4150/4160/4500

Holley Main Jet Extension 1/4-32 Thread Brass — Fits Holley 4150/4160/4500
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Holley Main Jet Extension 1/4-32 Thread Brass — Fits Holley 4150/4160/4500
Holley

Holley Main Jet Extension 1/4-32 Thread Brass — Fits Holley 4150/4160/4500

SKU: BBVL_122-5000
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About Holley Holley is the legendary American carburetor and fuel-injection ...Read More

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$15.63
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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
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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.

Watch in action

Prevent Fuel Starvation with Holley Jet Extensions

During hard acceleration or high-G cornering, fuel can slosh away from the main jets in your carburetor, leading to a lean condition and potential engine damage. Holley Main Jet Extensions are the ultimate solution. By extending the pickup point of your main jets further into the fuel bowl, these extensions ensure that your engine receives a constant supply of fuel, even under extreme conditions.

Key Features and Benefits

  • Prevents Lean Spikes: Keeps fuel at the jet orifice during hard launches.
  • 1/4-32 Thread: Designed for a secure, leak-free fit in standard Holley jets.
  • Durable Brass: Built to withstand fuel additives and high-vibration environments.
  • Wide Compatibility: Fits Holley 4150, 4160, and 4500 series carburetors.
  • Essential for Racing: A must-have for drag racing and high-performance applications.

If you are running a high-performance Holley or Demon carburetor, jet extensions are an inexpensive insurance policy for your engine. They are easy to install and provide peace of mind that your fuel system will perform when you need it most. Don't risk fuel starvation on your next run; equip your carburetor with genuine extensions from 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.

Watch in action

Prevent Fuel Starvation with Holley Jet Extensions

During hard acceleration or high-G cornering, fuel can slosh away from the main jets in your carburetor, leading to a lean condition and potential engine damage. Holley Main Jet Extensions are the ultimate solution. By extending the pickup point of your main jets further into the fuel bowl, these extensions ensure that your engine receives a constant supply of fuel, even under extreme conditions.

Key Features and Benefits

  • Prevents Lean Spikes: Keeps fuel at the jet orifice during hard launches.
  • 1/4-32 Thread: Designed for a secure, leak-free fit in standard Holley jets.
  • Durable Brass: Built to withstand fuel additives and high-vibration environments.
  • Wide Compatibility: Fits Holley 4150, 4160, and 4500 series carburetors.
  • Essential for Racing: A must-have for drag racing and high-performance applications.

If you are running a high-performance Holley or Demon carburetor, jet extensions are an inexpensive insurance policy for your engine. They are easy to install and provide peace of mind that your fuel system will perform when you need it most. Don't risk fuel starvation on your next run; equip your carburetor with genuine extensions from 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.

Watch in action

Prevent Fuel Starvation with Holley Jet Extensions

During hard acceleration or high-G cornering, fuel can slosh away from the main jets in your carburetor, leading to a lean condition and potential engine damage. Holley Main Jet Extensions are the ultimate solution. By extending the pickup point of your main jets further into the fuel bowl, these extensions ensure that your engine receives a constant supply of fuel, even under extreme conditions.

Key Features and Benefits

  • Prevents Lean Spikes: Keeps fuel at the jet orifice during hard launches.
  • 1/4-32 Thread: Designed for a secure, leak-free fit in standard Holley jets.
  • Durable Brass: Built to withstand fuel additives and high-vibration environments.
  • Wide Compatibility: Fits Holley 4150, 4160, and 4500 series carburetors.
  • Essential for Racing: A must-have for drag racing and high-performance applications.

If you are running a high-performance Holley or Demon carburetor, jet extensions are an inexpensive insurance policy for your engine. They are easy to install and provide peace of mind that your fuel system will perform when you need it most. Don't risk fuel starvation on your next run; equip your carburetor with genuine extensions from GGCRACING.

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