DWSg Power Filter, 1.4 - 2.4 inches (35 - 60 mm), Set of 2, General Purpose Mesh Air Cleaner Replacement Air Filter Recommended for Normal Carburetors.Special filters increase intake efficiency, increase power and power for powerful run.Better filters extend engine life When installed, the intake efficiency will change, so a carburetor setting is required. When driving in rainy weather, water may enter the filter and the carburetor setting may change. If the long rear shock is attached, the filter may interfere with the body.