EDELBROCK THUNDER AVS SERIES CARBURETOR, ENDURASHINE, 500 CFM -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; Square-Flange, Manual Choke (Non-EGR), Features Adjustable Valve Secondary That Allows For Simple And Accurate Tuning Across The RPM Range, Features Attractive Black Accents And CNC Profiled Front Face For A Custom Look, Designed And Calibrated For Air-Gap Dual Quad Applications, Use One Edelbrock Manual Choke And One Edelbrock Electric Choke Carburetor For Best Results On Dual-Quad Applications, Ideal For Small Cubic Inch Single Carb Applications When Recalibrated Per Packaged Instructions, Has The Same Black Accent Linkage Hardware As All The Edelbrock AVS Carbs, With Exclusive 12-Month Edelbrock Thunder Series AVS Complete Satisfaction Warranty Series: Edelbrock Thunder Condition: New Emissions: 49-State Legal - no CA shipments Product Fit: Minor Modifications Quantity Sold: Sold Individually Anticipated Ship Out Time: 1-2 Business Days Fuel Type: Gasoline Notes: For 500 cfm, square bore, manual choke Part Number: 18044