3-1/4" CARBURETOR STUD KIT STUDS ARE 3-1/4" LONG COMES COMPLETE AS SHOWN WITH 4 STUDS, 4 WASHERS & 4 NUTS FITS CHEVY, FORD, & MOPAR ENGINES WITH HOLLEY, EDELBROCK, ROCHESTER, ETC CARBS 5/16" COARSE / 5/16" FINE THREAD ON OTHER END THESE WILL WORK ON ALUMINUM OR CAST IRON INTAKES