Still using 1950's technology? Upgrade your carburetor with PROFORM's new race-oriented billet metering blocks. Each unit is CNC machined from solid billet aluminum for added strength and durability and features changeable idle feed restriction, 4 emulsions for more aggressive tuning, and additional racing application upgrades. Product Features:Race-Oriented Calibration ModelFits Holley 4150 and 4160 ModelsPurple Anodized FinishMade from Billet AluminumIncludes Two Gaskets and Vent Baffles
