The K&N RU-1001 is a universal clamp-on air filter with a tapered oval shape, cotton gauze media, and a molded rubber flange that clamps onto the intake tube. The manufacturer lists a 6.25 x 4 inch oval flange opening, a 6.25 x 4 inch top, a 5.5 inch base width, and a 5 inch height, so it suits custom intakes, race cars, generators, snowmobiles, and tractors where no direct-fit element exists. Because the gauze element is washable and reusable, you clean and re-oil it instead of replacing it at every service interval. The manufacturer rates it at up to 99% filter efficiency.
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Yes. The manufacturer describes K&N universal air filters as washable and reusable, and this part is listed as washable.
The manufacturer lists a re-oiling amount of 1.23 oz (36 ml) for this filter.
No. The manufacturer lists it as a universal-fit filter rather than a vehicle-specific part, so you need to confirm that your intake's opening and mounting space match the filter's dimensions.
The manufacturer does not publish a dedicated install sheet for this universal part number, so fitting it is a measure-and-clamp job. Measure the intake tube and the mounting space first, then work the rubber flange fully onto the tube and secure it with a hose clamp. Basic tools such as a tape measure, a screwdriver or nut driver for the clamp, and a clean rag for the sealing surfaces are typically enough. K&N's install sheets for its other filters warn that an improperly sealed filter can let unfiltered air reach the engine, so check the seal after clamping and again after each cleaning.
