Thermo Carburetor Insulator 20K/21C/20L/21H/21J by O.S.
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This product was added to our catalog on April 19, 2006.This is a replacement thermo carb insulator gasket for O.S. 20K/21C/20L/21H/21J carburetors. This is the small gasket that goes between the carburetor and the engine crankcase to stop heat transfer from the crankcase to the carburetor. This fits on the O.S. 21 VZ-B V-Spec and 30 VG engines.