Description
Product Overview
The Holley 121-142 Accelerator Pump Discharge Nozzle is engineered for optimal fuel flow in carburetor systems. Crafted from high‑quality plastic with a machined exterior, it provides a lightweight yet robust solution. Dimensions measure 5 x 3.45 x 1.2 inches, featuring a 3.45‑inch press‑type inlet and a 0.25‑inch flare outlet, ensuring a secure fit for a variety of applications.
Usage
Designed for automotive carburetor accelerator pumps, this nozzle excels in both street and track environments. It suits performance‑oriented drivers, mechanics, and DIY enthusiasts who demand consistent fuel delivery during rapid throttle changes. 
Why Choose Us
Holley’s reputation for genuine, high‑quality parts guarantees reliability and longevity. Each nozzle undergoes strict quality control, offering a warranty and the assurance of OEM‑level performance. Our parts are backed by extensive automotive expertise, making them a trusted choice for professionals and hobbyists alike.
Key Features
- Durable plastic construction with precision‑machined finish
- Press‑type inlet for quick, tool‑free installation
- 0.25‑inch flare outlet ensures leak‑free fuel flow
- Compact dimensions fit tight engine bays
- Genuine Holley part with warranty support
FAQ
What vehicles are compatible with this nozzle?
The 121-142 model fits most carbureted engines that use a standard 3.45‑inch inlet and 0.25‑inch flare outlet, common in many classic and performance cars.
Is any special tool required for installation?
No special tools are needed; the press‑type inlet allows hand‑press installation, though a basic press tool can speed the process.
How does the machined finish benefit performance?
The machined exterior reduces friction and resists wear, maintaining consistent fuel flow and extending the part’s service life.
Does this part come with a warranty?
Yes, Holley provides a standard warranty covering manufacturing defects for this nozzle.
Can I use this nozzle for racing applications?
Absolutely. Its precise fuel delivery and robust construction make it suitable for both street driving and high‑performance racing scenarios.







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