4150 Ultra XP Carburetor 750CFM Methanol

The 4150 Ultra XP Carburetor 750CFM Methanol by Holley is designed specifically for serious racers and performance enthusiasts utilizing methanol-fueled engines in competitive and high-output street applications. This carburetor is engineered to provide reliable and consistent fuel delivery under extreme conditions where traditional gasoline carburetors may falter.

The 4150 Ultra XP features a four-barrel configuration with dual fuel bowls that are optimized for methanol's unique combustion characteristics. It includes enhanced internal passages and precision-calibrated fuel metering circuits, ensuring robust performance and stability even under high fuel flow demands. The carburetor is built to withstand methanol's aggressive solvent properties, making it suitable for high-performance applications.

Ideal for builders upgrading from stock or undersized fuel delivery systems, the 4150 Ultra XP is perfect for carburetor enthusiasts who prefer manual tuning control over EFI. It supports naturally aspirated engines in the 550–650 horsepower range, providing stable idle quality and precise throttle response essential for both bracket racing and street applications.