CARBURETOR

Holley Ultra XP carburetors are designed for extreme performance, featuring a 38% lighter all-aluminum construction and 20% greater fuel capacity than traditional race carbs. This 600 CFM model (4150UXP) is available in a Hard Core Gray hard coat anodized finish with Black billet components, or natural tumble-polished aluminum with Black or Red metering blocks and base plate. Key features include integrated idle bypass valves, high-capacity fuel bowls with an integrated fuel shelf and internal baffling, and clear sight windows. The series also features fully tunable billet metering blocks and base plate, adjustable secondary linkage, and knurled (hand adjustable) curb idle screws. Circle Track Carburetors within this series are calibrated specifically for racing and include an anti-siphon valve and wedge floats.