Proform - Billet Metering Block For Holley 4150 Series Carburetors, Double Pumper Upgrade (778-67165C)
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Enhance the performance for your main body with billet metering blocks. Machined from solid aluminum, they virtually eliminate porosity problems and will not warp. Features changeable idle feed restrictions with additional upgrades for racing applications. For Holley style carbs. There's no reason to still be using 1950's technology. Upgrade your carburetor with these Proform Billet Metering Blocks today!