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: Metering Jets - Primary .095, Secondary .098; Metering Rods - .068 x .047; Step-Up Spring - Orange (5" Hg). Edelbrock Thunder Series AVS Carb 1806 New - 650 CFM - Square Flange - Elec Choke - w/o EGR - Includes Primary Jet-.095/Secondary Jet-.098/Metering Rd/DualPlane Intake - Street/Hi Performance UsageNew Qwik-Tune Adjustable Secondary Air ValveOptional Single Or Dual Fuel InletDistinctive Black Accented HardwareNo Gaskets Below Fuel Level to Prevent LeakageMetering Rod/Step Up Springs Can Be Changed EasilyGM/AMC-Style Throttle LinkageExclusive 12 Month Complete Satisfaction WarrantyPit Stop USAoffers Edelbrock Thunder Series AVS Carb 1806 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 Thunder Series AVS Carburetors.