Holley Vacuum Secondary Spring Kit 20-13 for Carburetors with Steel Color Coding

The Holley Vacuum Secondary Spring Kit part number 20-13 is designed for use with Holley 4150, 4160, and 4500 series carburetors. This set includes seven steel springs, each color-coded for easy identification and adjustment. These springs are engineered to control the operation of the secondary throttle plates, ensuring precise secondary opening and optimal throttle response. The springs are air unrestricted, allowing for smooth and reliable performance across various driving conditions. They are suitable for both street and racing applications, providing consistent performance without the need for additional modifications.

Installation of this spring kit is straightforward, making it an excellent upgrade for carburetor tuning and performance enhancement. The durable steel construction ensures longevity and resistance to wear, even under high-performance conditions. Whether you are rebuilding your carburetor or fine-tuning for specific performance goals, this kit offers a reliable solution to improve throttle response and acceleration. Proper secondary spring selection can significantly influence your vehicle’s drivability, fuel efficiency, and overall power output.

This set is compatible with a wide range of vehicles equipped with Holley carburetors and is ideal for enthusiasts seeking to optimize their carburetor's secondary circuit. The kit's color-coded springs allow for quick adjustments and troubleshooting, making tuning more accessible and effective. Invest in the Holley vacuum secondary spring kit to enhance your carburetor's performance with precision and durability.

Features:

• Includes seven steel springs with color coding for easy identification

• Designed for Holley 4150, 4160, and 4500 carburetors

• Air unrestricted operation for smooth secondary opening

• Precision control of secondary throttle plates

• Durable steel construction for long-lasting performance

• Ideal for street, strip, and racing applications

• Simple installation and tuning for improved throttle response