Chirco performance offers our Sand Rail customers these popular air filter adapters that fit both Dune Buggy's and Sand Rail's, this common adapter bolts to the top of a Weber progressive carburetor and allows you to use our two-stage Dune Buggy air filters, we also offer the 2 inch rubber air filter adapter that would bolt directly to your original Volkswagen carburetor and allow you to use our 2 inch neck dual stage Dune Buggy air filter, please browse all of our Dune Buggy fuel system categories for all your parts needs