650 CFM - 4175 - Vacuum Secondaries - Polished Aluminum - Gasoline , Replaces 0-80555C. Do you like the tunability of Holley's modular carbs, but need to simply replace a Q-jet? The spread bore bolt pattern of the 0-80555S lets you do just that. It has vacuum secondaries and electric choke, so it is useable on a wide variety of vehicles. Don't trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60's. ***The 0-80555S is a Model 4175 designed to fit GM spread bore passenger car and light truck applications. It is not compatible with Ford or Chrysler Spread bore applications.
