Designed and calibrated for optimum street performance in small-block and some big-block engines. Match with a variety of manifolds that include Edelbrock Performer, Performer EPS, Performer RPM, RPM Air-Gap, Torker II and other brands of similar design. Includes both timed and full vacuum ports for ignition advance. Electric choke #1478 can be added if needed. Comes with: Metering Jets - Primary .100, Secondary .095; Metering Rods - .070 x .047; Step-Up Spring - orange (5" Hg). Edelbrock Performer Series Carb 14053 600 CFM - Square Flange - Manual Choke - w/o EGR - Includes Primary Jet-0.100 - Secondary Jet-0.095 - Metering Rod-0.070x0.047 - Black FinishOut-of-the-Box Bolt-On PerformanceValves Promote Excellent Flow For Streetable PowerPit Stop USAoffers Edelbrock Performer Series Carb 14053 at low everyday prices. Be sure to check out all of the products from Edelbrock including Edelbrock Fuel System and Intake Parts and Accessories, Edelbrock Carburetors, Edelbrock Gasoline Carburetors, Edelbrock Carburetors, Edelbrock Performer Carburetors.