Air Filters and Velocity stacks for 43-49cc 2-stroke engines. 43 and 49cc 2-stroke engines are common on stand up gas scooters, pocket bikes, mini choppers, small atv's and small dirt bikes. VELOCITY STACKS FOR 43-49CC 2-STROKE ENGINES ARE USED FOR INCREASING THE VELOCITY OF AIR INTO YOUR CARBURETOR AND ENGINE. THE AIR FILTERS CLAMP TO THE OUTSIDE OF THE VELOCITY STACKS. INSTALLING A VELOCITY STACK WILL REMOVE THE STOCK CHOKE LEVER, CHOOSING A CHOKE PLATE FOR YOUR VELOCITY STACK MAY BE NECESSARY.

Air Filters and Velocity stacks for 47/49cc 2-stroke engines. 47/49cc 2-stroke engines are common on small Cag/Daytona style pocket bikes, small pocket quads and small dirt bikes. VELOCITY STACKS FOR 47/49CC 2-STROKE ENGINES ARE USED FOR INCREASING THE VELOCITY OF AIR INTO YOUR ENGINE. THESE STYLE ENGINES USE A "FLOAT" STYLE CARBURETOR AND USE DIFFERENT VELOCITY STACKS TO MOUNT TO THE STOCK CARBURETOR. NO VELOCITY STACK GASKET IS NECESSARY TO MOUNT TO 47/49CC STOCK CARBURETORS.