Holley 134-131 - Metering Block, Primary, Holley 3310, Model 4160

They are designed to be exact replacements for your existing Holley 3310 model 4160 series carburetor, so they don't require any modifications to install them correctly. Manufactured from quality die-cast zinc with a gold iridite finish, this Holley replacement metering block will keep your carburetor running correctly.