Billet Metering Block Kit E85 - Fully Adjustable QUICK FUEL, QUICK FUEL,Our billet aluminum metering blocks are machined to very strict tolerances then anodized for protection and good looks. CNC cut from premium aluminum and filled with precision parts, these blocks provide the ultimate platform for your performance carburetor. QUICK FUEL, QUICK FUEL,Fully adjustable calibration for out of box E85 performance - designed to fit most real world street & race carburetors. Simply add your jets and power valve to complete the installation. Includes the following items. Addional carburetor modifications will be required to run E85. QUICK FUEL, QUICK FUEL,2-Circuit Metering Block for 4150 and 2-Circuit 4700 carburetors