Holley 121-40 Accelerator Pump Discharge Nozzle 0.040 Aluminum Pair

Holley 121-40 Accelerator Pump Discharge Nozzle 0.040 Aluminum Pair

The Holley 121-40 Accelerator Pump Discharge Nozzle is a precision-engineered component designed to improve fuel delivery in your automotive fuel system. Manufactured from high-quality aluminum, these nozzles ensure durability and resistance to corrosion, making them ideal for a variety of performance applications. The 0.040-inch opening size allows for optimal fuel atomization, enhancing engine performance and throttle response when you need it most.

As a critical part of the carburetor assembly, the accelerator pump discharge nozzle works by injecting a precise amount of fuel into the engine during acceleration. This function is essential for maintaining the proper air-fuel mixture, which is crucial for maximizing horsepower and torque. By offering a quick burst of fuel, this component plays a significant role in reducing bogging and improving overall acceleration under load.

FITMENT: The Holley 121-40 is compatible with various Holley carburetor models. It's suitable for applications where enhanced throttle response and improved fuel delivery are desired. Ensure compatibility with your specific carburetor model before installation for optimal performance.

Key Features & Benefits

• Precision-engineered 0.040-inch nozzle for optimal fuel delivery.
• Constructed from high-quality aluminum for durability and resistance to wear.
• Improves acceleration and throttle response, reducing engine bogging.
• Essential for maintaining an ideal air-fuel mixture during rapid acceleration.
• Easy installation for quick upgrades to existing carburetor systems.

Shipping. Free on every order, US only. Orders arrive in 2–4 days.

Returns. 30-day returns, except in extreme cases.

Support. Our team is available 24/7 for fitment mismatches or any other reason.

Warranty. Full manufacturer guarantee.