Application: For Universal Fitment Like Vehicles/Motorcycles/Boats/Racing Cars. For Neck Size 100mm(4) Air Inlet System. Features: High quality assurance tested, more responsive,less expensive, Perfect replacement for aftermarket intake system. Mushroom head air intake filter, clamp on design,bolt on directly,easier to install. Stop sucking hot air from high temperature engine compartment. Extremely improve the smoothness of driving. Washable and reusable filter cartridge, avoiding disposable filters,economical and practical. Draw more air into engine to improve throttle response and enhance horsepower. The fine mesh increases the amount of air flow, straightens the flow and stop sucking hot air from high temperature engine compartment. Gain instant horsepower (5-8 hp) by improving the filtration process Air box design stores a plenty of fresh air and avoid blocked by insufficient air intake while oil