All Balls Racing - Air Cut off Valve Rebuild Kit (46-1021) Options:(46-1021) the Air Flow model has

the Air Flow model has more vents for more air flow on the shell and on the chin cover

Using DuPont™ Kevlar® lining

TruDri® fabric moves sweat away from the body to keep you dry

no need to remove your helmet

All Balls Racing - Air Cut off Valve Rebuild Kit (46-1021) Options:(46-1021) the Air Flow model hasKit Includes all necessary parts to rebuild the air cut off valve circuit. Models with multiple carburetors include components to repair all carburetors. Kit includes necessary o rings, diaphragm, spring, screws. Improperly functioning air cut off valves can stick open or closed causing popping on deceleration or poor running conditions.