Bolt-On Universal Air Filter Part No.: 98FR01 (FIR-BRAND - Factory Image Racing) Compatibility: Ideal for ATVs, quads, dirt bikes, motorcycles, scooters, and go-carts with a 32mm manifold carburetor. Compatible with both 2-stroke and 4-stroke engines. Specifications: Filter Size: Diameter 61mm (top) / 51mm (base), Length 48mm Manifold Bore: 32mm ID, flexible fit with rubber flange and adjustable clip to accommodate carburetor inlets +/- 2mm. Features: Enhanced Performance: Shields engine from dirt, boosting longevity and horsepower. Durable, Reusable Filter: Constructed from woven cotton within a fine mesh gauze; washable and reusable without performance degradation. Robust Chrome-Plated Steel End Cap: Adds durability and style. Easy Installation: Flexible rubber flange with an adjustable clip for quick, secure fitting. Quality Guarantee: FIR-BRAND products are designed for reliability, ensuring customer satisfaction with every part and accessory.