Mechanical Secondary-4150; Xtreme Performance - Holley Ultra XP&trade: carburetors! 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&trade: hard coat anodized finish with Black&trade: billet for improved corrosion protection. They're also available in natural tumble-polished aluminum with your choice of Black&trade: or Red&trade: metering blocks and base plate. The Aluminum Ultra XP comes in 600, 650, 750, 850, and True 950-CFM.
