Main Jets (2)

Enhance your engine’s performance with the HOLLEY Main Jets (part number 12278), designed to optimize air and fuel flow for superior combustion efficiency.

• Precision-engineered for accurate fuel delivery, ensuring your engine runs smoothly and efficiently.
• Lightweight design at just 0.020 lbs, making installation easy without adding unnecessary weight to your vehicle.
• Compatible with a range of applications, these jets help fine-tune your carburetor setup for improved throttle response.
• Durable construction ensures long-lasting performance, providing reliability you can count on for all your driving needs.

The HOLLEY Main Jets are essential for achieving the perfect fuel mixture in your carburetor system. Upgrade your setup for enhanced power and efficiency.

Choose HOLLEY for trusted quality and performance in air and fuel management.