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New DAYTONA Universal Zenith updraft carbs come in a variety of sizes to fit various engines of displacement up to 300 ci. The flange sizes vary depending on the size of carburetors. Standard bolt spacing is the 2 1/4, 2 3/8, and 2 11/16". Adustable high speed main jet, adjustalble throttle lever, manual choke. Call or email for your exact fitment.