Description
Holley Aluminum Metering Block. Great for street or strip custom Calibrating. This all Cast Aluminum metering block comes with Threaded idle feed channels, and power valve channel. The Emulsion circuit is NOT threaded. 3 emulsion holes on each side. This metering block is ideal for the primary side of any 4150 or 4160 style carburetor. Block will come with .031″ idle feed restriction and .046″ power valve restriction. You can purchase additional restrictors and set this block up however you would like.