Holley Carb 600 Cfm 4 Barrel Model 4150 Holley Mechanical Secondary HOL0-80801HBX

Carb 600 cfm 4 barrel model 4150 Holley mechanical secondary aluminium Ultra XP 600cfm hard black 0-80801HBX

Holley Xtreme Performance Ultra XP™ Carburettor

Ultra XP carbs are up to 38% lighter than our traditional race carbs, have fuel capacity that is 20% greater and 30 other new features! They’re available in our all-new Hard Core Gray™ hard coat anodized finish with Black™ billet for improved corrosion protection.
Holley Ultra XP carburettors offer new features such as an integrated idle by pass valve that allows for idle adjustments while maintaining the correct throttle plate to transfer slot relationship, high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, adjustable secondary linkage and knurled (hand adjustable) curb idle screws.
Holley Ultra XP carburettors are the ultimate in square bore race carburetors!