Edelbrock PERFORMER Series Carburetor600 cfm, square-flange, electric choke (non-EGR)A precisely tuned, quality-built carburetor should be able to handle the rigors of daily driving while delivering consistent, reliable street performance from day to day. Several characteristics make Edelbrock's carburetors outstanding street performers. The first one is that they use metering rods to transition between circuits. They are unaffected by engine backfires, which means that there are no power valves to blow out, and the rods can be changed in seconds without carburetor removal or fuel draining. Secondly, they have the unique ability to "hold a tune", so once they're tuned, they stay tuned. What this means to you is that compared to other carburetors, the performance remains consistent and the calibration stays unchanged. The lightweight all-aluminum body features a two-piece body that resists warping and is compatible with gasohol and blended fuels. The outside is ball-burnished for a bright finish. The simple tub-type bowls and rear-pivot floats all contribute to a carburetor that's reliable, user-frienly, and is easily tuneable for miles and miles of trouble-free operation.Edelbrock carburetors bolt on and run right out of the boxDependable street performance and smooth throttle response throughout the power bandFloat levels are factory set, adjustments are rarely neededChange jets, adjust floats and replace needles/seats without draining fuel or removing carb from manifoldTwo-piece design means no gaskets below the fuel level for leak-free operationGet performance you can count on from a name you can trust... Edelbrock!Designed for small-block and small displacement big-block engines, these carbs are recommended only for stock to Performer level applications. They are not recommended for use on RPM or Torker II intake manifolds. Match with an Edelbrock Performer or Performer EPS manifold or other brands of similar design. Calibrated 2% leaner than 11001. Includes both timed and full vacuum ports for ignition advance. Comes with: Metering Jets - Primary .098, Secondary .095; Metering Rods - .075 x .047; Step-Up Spring - yellow (4" Hg). Use Edelbrock's Carb Stud Kits 10966 or 10967 if needed.Not legal for use on pollution controlled motor vehicles.