R2C UMP Replacement Filters 10905L 4" UMP Long IntakeProduct images may differ from actual product appearance.
R2C UMP Replacement Filters 10905L 4" UMP Long Intake
R2C's replacement UMP filters utilizing their synthetic fiber design.
Unlike organic materials (cotton and cellulose) R2C's synthetic fibers stay stable over its entire life. It doesn't shrink or degrade with time and exposure to harsh atmospheric environments. Their dirt series filters require no oiling and can be cleaned out by using compressed air.
The size is reference to the diameter of the outlet side of the filter going to the engine.