Designed and calibrated for small cubic-inch engines such as 305 c.i.d and smaller Chevrolet; 302 c.i.d. and smaller Ford and dual-quad applications such as Edelbrock C-26, F-28 and Street Tunnel Ram. Match with an Edelbrock Performer or Performer EPS manifold and other brands of similar design. Includes both timed and full vacuum ports for ignition advance. Comes with: Metering Jets - Primary .086, Secondary .095; Metering Rods - .065 x .052; Step-Up Spring - orange (5" Hg). Edelbrock Performer Series Carb 1403 500 CFM - Square Flange - Elec Choke - w/o EGR - Includes Primary Jet-0.086 - Secondary Jet-0.095 - Metering Rod-0.065x0.052 - Dual Quad Plane Intake - Street-Hi PerformanceBurnished AluminumGM/AMC-Style Throttle LinkageElectric Choke Installed from FactoryEasy Tuning with 2-Piece DesignSmooth Secondary TransitionBoth Timed and Full Vacuum PortsIncludes PCV OutletPit Stop USAoffers Edelbrock Performer Series Carb 1403 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.