K&N universal round tapered air filter with a 4.5" flange inlet, 5" filter height and rubber top. The RU-4260 is a clamp-on universal element with an inlet flange inside diameter of 4.50 in. and a 5.875 in base diameter that tapers to a 5.125 in top diameter. Its oiled cotton gauze media is washable and reusable, so you clean and re-oil it rather than replacing a disposable paper element. K&N positions its universal line for racing vehicles, generators, snowmobiles, and tractors, and says the element is designed to increase horsepower and acceleration. Any claimed gain should be checked against your own setup, since the manufacturer does not tie a specific output figure to this part.
This is not a vehicle-specific part, so fitment depends on matching the intake tube. Many hundreds of models are available, so regardless of the angle or offset diameter of your air intake, there is likely a K&N universal air filter for your equipment. The rubber flange gives some tolerance: the flanges absorb vibration, allow for secure attachment, and can be stretched for up to 1/16 in. (1.5mm) to fit in-between sizes. Search terms that match this listing include 4.5 inch flange universal air filter, round tapered clamp-on air filter, 5 inch tall cotton gauze air filter, and K&N RU-4260 replacement.
No. The manufacturer lists it as a universal filter for a wide range of applications, so you need to confirm that the 4.5 in. inlet and 5.875 in. base diameter match your intake tube before ordering.
The manufacturer states the molded flanges can be stretched up to 1/16 in. (1.5mm) to fit between standard sizes. That covers small mismatches only, not a large difference in diameter.
This is a clamp-on filter, so installation is a matter of slipping the rubber flange over the intake tube and securing it with a hose clamp. Check that the flange sits centered on the tube and that the clamp is tight enough to seal, since a loose connection lets unfiltered air bypass the media. Because the element is pre-oiled, it is ready to use out of the box, and you only need to clean and re-oil it at service intervals. Note that the flange can only stretch about 1/16 in. to fit a slightly different intake, so do not force an oversized or undersized fit.
