Designed and calibrated for optimum off-road 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 and other brands of similar design. Includes spring-loaded needles and seats for superior fuel control in off-road terrain. Includes: Metering Jets - Primary .095, Secondary .098; Metering Rods - .065 x .047; Step-Up Spring - Orange (5" Hg). Edelbrock Thunder Series AVS Off-Road Carb 1825 New - 650 CFM - Square-Flange - Manual Choke - w/o EGR - Prim. Jet-0.095 - Secondary Jet-0.098 - Metering Rod-0.065x0.047 - Dual Plane IntakeSpring Loaded Needles/Seat Increase PerformanceNew Qwik-Tune Adjustable Secondary Air ValveDistinctive Black Accented HardwareLightweight Ball-Burnished AluminumNo Gaskets Below Fuel Level to Prevent LeakageMetering Rod/Step Up Springs Can Be Changed EasilyGM/AMC-Style Throttle LinkagePit Stop USAoffers Edelbrock Thunder Series AVS Off-Road Carb 1825 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 Off-Road Carburetors.