Carburetor Metering Block Race-Oriented Calibration Holley 4150/4160 Models ProformStill using 1950 technology? Upgrade your carburetor with PROFORMs 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. Sold as one kit. Product Details: Engine Carburetor Metering Block Race Oriented Calibration Model Fits Holley 4150 And 4160
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