Jet And Rod Kit #1812 And 1813 AVS, Thunder AVS Carburetor Calibration Kit #1841 for #1812 & #1813 Carburetors, The Edelbrock Jet And Rod Kit 1841 For #1812 And 1813 AVS, The Edelbrock Jet And Rod Kit 1841 For #1812 And 1813 AVS, Jet Rod Kit, Carburetor Calibration Kit.