The K&N RU-5283HBK is a universal clamp-on Dryflow air filter with a round tapered body, built for applications where a standard filter won't fit a custom intake tube. The manufacturer's universal line is designed for racing vehicles, off-road builds, generators, snowmobiles, and tractors, and the filter uses dual layers of dry synthetic media rather than oiled cotton. Its molded rubber flange absorbs vibration and grips the intake, so you don't need a specific vehicle application to mount it. Choose this over a disposable paper filter when you are running a custom intake and want a washable element that you can clean and reuse. Track and build enthusiasts searching for a 4.5 inch flange, 8 inch base, universal tapered air filter, or reusable intake filter will find the dimensions here. Verify that the flange and base diameters match your intake before ordering.
The manufacturer lists this as a universal filter rather than a vehicle-specific part. Fitment depends on whether your intake tube matches the 4.5 inch flange inside diameter and the 8 inch base outside diameter, so measure your intake before buying.
The manufacturer states that the molded rubber flanges can be stretched up to 1/16 of an inch (1.5mm) to fit in-between sizes. That allowance is small, so it helps with minor mismatches rather than large ones.
The manufacturer describes K&N universal filters as washable and reusable. Confirm the recommended cleaning interval and the approved cleaner with the manufacturer before your first service.
The manufacturer does not publish a single install procedure for universal filters, so the job depends on your intake layout. Expect a basic hose-clamp swap if the filter mounts directly to an intake tube. Before tightening anything, confirm the flange seats fully and the clamp is snug but not crushing the rubber. Owners on user forums commonly advise hand-seating the filter into the lid or housing before closing it, and working on a bench when the intake is tight. Do not force the lid or clamps closed, because a misaligned housing can crack and let unfiltered air bypass the element.
