The K&N RC-4900 is a universal round tapered air filter, sized with a 7.375 in base outside diameter, a 6.625 in top outside diameter, and a 7.875 in height. Because it is a universal fit rather than a vehicle-specific part, buyers should match those three dimensions against the intake opening and clearance on their engine bay before ordering. The tapered profile is meant to fit cone-style intake housings, and the 7.375 in base is the dimension to check first on any aftermarket intake setup. Searches for K&N RC-4900 fitment, round tapered universal air filter dimensions, and cone filter replacement sizing will help you confirm that the RC-4900 is the right diameter for your application.
