The K&N E-3120 is a round, reusable replacement element with a 2.875 in (73 mm) inside diameter and 3.875 in (98 mm) outside diameter, and a 2-inch height. Its cotton gauze media is layered to improve airflow while capturing contaminants. Compared with a disposable paper element, the washable cotton design lets you keep one filter in service for years. The manufacturer says it is washable, reusable, and engineered to last for the life of your vehicle, and it lists a No-Hassle Lifetime Limited Warranty. Buyers looking for a 2.875 ID round air filter, a reusable cotton gauze air filter, or a K&N E-3120 cleaning and oiling kit replacement will find this element a practical long-term choice.
Fitment is the main thing to verify before ordering. The manufacturer describes this as a High-Flow Original Universal Air Filter, so confirm that the stock element in your housing measures the same inside diameter, outside diameter, and height. Per the manufacturer, it is engineered to fit easily into your factory air box. The manufacturer also states the element is emissions legal in all 50 States and that it will not void vehicle warranty. Install is a straightforward swap for most users, and maintenance is the real ongoing task.
Cleaning and oiling follow the manufacturer's sequence: apply K&N cleaner to both sides, let it soak, rinse with cool low-pressure water, allow it to dry fully, then oil the pleats. The manufacturer recommends cleaning only every 50,000 miles under normal highway driving conditions. Use only K&N-branded cleaner and oil, because the manufacturer warns that the use of any other cleaning solution or method could damage the filter.
The manufacturer states that this element only needs cleaning about every 50,000 miles under normal highway driving conditions. Harsher or dustier conditions may call for more frequent service.
The manufacturer states that this element is emissions legal in all 50 states and will not void the vehicle warranty.
The manufacturer's cleaning instructions call for K&N Air Filter Cleaner and K&N filter oil only. The manufacturer warns that any other cleaning solution or method could damage the filter media.
Installation is a drop-in swap: remove the factory element from the round air box, check the housing for debris, and seat the K&N element so the housing and cover close without strain. The manufacturer's guidance is to inspect the filter for damage before reinstalling it and to follow any specific instructions included with the element. For cleaning, the manufacturer's sheet specifies K&N cleaner applied to both sides, a 10-minute soak without letting the cleaner dry on the filter, a rinse with cool low-pressure water, then a full air dry before oiling. Apply oil along the pleats, wait about 20 minutes for it to absorb, and touch up any light-colored areas until the media is an even color. Oil only after the filter is completely dry, since moisture prevents the oil from absorbing properly.
