This super convenient wrench will help you get to the carb nut and tighten it perfectly so you won't have to worry about vacuum leaks or warping your manifold.
AirCooled 13mm Carburetor Wrench
13MM Curved German Carburetor Wrench - Fits All Air Cooled VW Motors
For YATO YT-0342 COMBINATION WRENCH 13MM
AirCooled Universal SU Bubble Carburetor Synchronizer Tool Prt# AC000130B
AirCooled 30 Pict Carburetor Spacer “1/2” With Hardware Prt# VRD616
AirCooled Type 1 IDF Dual Carburetor Linkage Kit Prt# AC129690