The K&N 33-2285 is a washable, reusable High-Flow panel air filter built from layered, oiled cotton gauze, designed to replace the factory paper element in the stock air box. The manufacturer describes the media as engineered to improve airflow while still capturing contaminants, and says the filter is designed to provide an increase in horsepower. A reusable element can cost less over the life of the car than repeatedly buying disposable paper filters. The manufacturer calls for cleaning about every 75,000 miles under normal highway driving, and the filter carries a no-hassle lifetime limited warranty. Searchers looking for a 2004-2009 Mitsubishi Galant or Endeavor drop-in filter, or a 2006-2009 Eclipse K&N replacement, will find the 33-2285 listed for those applications. Owners on user forums report that a drop-in K&N gives a modest flow gain at best, so it suits buyers who want reusable filtration and a direct replacement rather than a full cold-air intake.
The filter is listed by the manufacturer for Mitsubishi Galant and Endeavor models from 2004 through 2009 and Eclipse models from 2006 through 2009. Sources disagree on later model years, so confirm your exact model year against the manufacturer before ordering. Its outside dimensions are roughly 9.19 by 8.56 inches, with a 0.81-inch height, so it sits in the factory box without cutting. The manufacturer specifies about 0.87 oz (26 ml) of re-oiling oil per cleaning cycle. Mitsubishi owners searching for a Galant drop-in air filter, Endeavor K&N upgrade, or Eclipse reusable filter cleaning kit will find this part matches those queries.
The manufacturer lists this filter for Mitsubishi Galant and Endeavor models from 2004 through 2009 and Eclipse models from 2006 through 2009. Some sellers list later years, so confirm your exact model year with the manufacturer before ordering.
The manufacturer says the filter typically needs cleaning about every 75,000 miles under normal highway driving conditions. Driving on dusty roads will shorten that interval.
The manufacturer specifies about 0.87 oz (26 ml) of K&N filter oil. Owners on user forums warn that over-oiling can contaminate the mass airflow sensor, so apply the oil lightly and let the filter dry fully before reinstalling.
This is a basic drop-in job: open the factory air box, remove the stock paper element, and set the K&N in the same orientation. No cutting or trimming should be needed, and no special tools are required beyond a screwdriver or socket for the air box clips. When you clean the filter later, wash it with K&N filter cleaner, let it air-dry completely, then apply the manufacturer's recommended amount of oil evenly across the media. Owners on user forums advise keeping oil off the sensor side of the filter to protect the MAF sensor.
