Bring your carburetor into the new generation by going green. These Quick Fuel E85 billet metering block conversion kits feature standard calibration, screw-in idle feed restrictors, no secondary power valve provision, and a 4-mixture idle screw setup. The metering blocks are CNC-machined from billet aluminum and green anodized for protection. Specifically designed for use with E85 fuels, these Quick Fuel E85 billet metering block conversion kits will give your carburetor the adjustability you've been looking for, all while protecting the environment and going green.