Holley Performance 34-13SA Carburetor Metering Block

4160 to 4150 Conversion Kit for 0-3310SA and 0-80508SA;

Easily convert your 0-3310SA or 0-80508SA 750 CFM carburetor to a model 4150 by adding a secondary metering block. The addition of a secondary metering block will allow you to fine tune your carburetor by utilizing replaceable main jets versus the fixed orifices found in a metering plate.;