The diameter of the air filter in this link is 38-40mm (1.5-1.57inch) Features: - Designed To Improve Throttle Response And Add More Horsepower. - High Quality 360 Degree Air Filter Increases Air Flow Into Engine. - Accordion Mesh Design Improves Filtration Process. - Comes With Adjustable Clamp For A Perfect Fit. Easy Installation. - Bright Colors, Enhance The Outstanding Look Of Your Motorcycle. - Universal Fit For Most Motorcycle With 38-40mm(1.5-1.57inch)Engine Inlet. Specification: Condition: New Material: Metal + Fabric Color: As Picture Show All Height:49mm Inlet Diameter: 38-40mm(1.5-1.57inch) Fitment: Universal Fit For Most Motorcycle With 38-40mm(1.5-1.57inch)Engine Inlet Package Included: 1x Air Filter.
