6-521 Holley Needle & Seat,.150 Titanium
6-521 Holley Needle & Seat,.150 Titanium
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6-521 Holley Needle & Seat, .150 Titanium
Upgrade your Holley Performance Carburetor with the 6-521 Needle and Seat assembly. This innovative assembly is engineered to enhance your carburetor's performance, ensuring that you get the most out of your engine.
Main Features:
- Bigger Seat Size: With a large 0.150 inch seat, experience increased fuel flow that boosts engine efficiency.
- Titanium Needle: The titanium construction offers enhanced responsiveness and sealing capabilities, ensuring optimal performance under high-pressure conditions.
- Compatibility: Specifically designed to work seamlessly with racing fuels including benzine, acetone, and alcohol.
- Adjustable Design: Tailor the flow to your specific needs for high-performance applications.
- Complete Installation: Comes with all necessary hardware for easy installation and setup.
Elevate your carburetor’s performance with the 6-521 Holley Needle & Seat assembly. This essential upgrade is perfect for racing enthusiasts and anyone looking to optimize fuel flow and compatibility with high-performance racing fuels. Plus, it is backed by a limited 90-day warranty, making it a risk-free addition to your racing setup.
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.

