121-137 Holley Pump Discharge Nozzle
121-137 Holley Pump Discharge Nozzle
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121-137 Holley Pump Discharge Nozzle
The 121-137 Holley Pump Discharge Nozzle is an essential component for optimizing your vehicle's performance. Designed specifically for Holley Model 4150, 4160, and 4500 carburetors, this nozzle ensures precise tuning of your accelerator pump system.
Key Features:
- Performance Tuning: A range of accelerator pump discharge nozzle sizes is crucial for fine-tuning your engine's performance.
- Optimal Fuel Discharge: The nozzle hole size dictates the speed of fuel discharge; a larger hole releases fuel quicker and with less pressure compared to a smaller one.
- Two Nozzles Included: Comes with two nozzles, each stamped with their specific sizes for easy identification.
- Gaskets Included: Each purchase includes necessary gaskets for hassle-free installation.
- Limited Warranty: Backed by a 90-Day warranty for your peace of mind.
Specifications:
- Nozzle Size: 0.037 Inch
- Number of Nozzles: 2
Upgrade your carburetor system with the 121-137 Holley Pump Discharge Nozzle for improved throttle response and overall engine performance. Make the smart choice for your vehicle today!
Shipping & Returns
Shipping & Returns
📦 Shipping:
Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days, depending on your location.
↩️ Returns:
You may return or exchange products within 60 days of receiving your order. Items must be in original condition with proof of purchase. If your item is defective or damaged due to manufacturing issues, we’ll replace it at no additional cost.

