Holley Carburetor Kit | Sierra 18-7039 Sierra 18-7039 Carb Kit Holley Carburetor Kit Contains adjustable needles and seats For Holley carburetors with R-84018AA, R-84023AA, R-84028AA, R-84038AA, R-84039AA, R-84044AA, R-84044-1AA, and R-84046AA list numbers Replaces Holley 3-1445 Replaces Crusader 46102, 46103 Replaces Indmar 611022