The K&N RF-1048DK is a black Drycharger pre-filter wrap for round tapered air filters, made from silicone treated polyester and sized for a 7.5 in base, 4.5 in top, and 6 in tall filter. The sleeve slides over an existing K&N filter and adds a first stage of protection. The manufacturer describes a polyester mesh with uniform micron-sized pores that stops dirt and dust particles as small as 127 microns before they reach the element. The silicone treatment also repels water, so splashes and road spray hit the wrap before they reach the media. Buyers searching for a round tapered pre-filter wrap, a K&N Drycharger for a universal cone filter, or a water-repellent filter sock for a 7.5 x 4.5 x 6 filter will find this is the correct size.
The reason to pay for this wrap instead of running a bare filter is protection in dusty, muddy, or wet conditions. It is designed to catch small dirt particles while adding little restriction to the filter's airflow. The water-repellent finish is not a seal. The manufacturer notes the DryCharger is water repellent, not waterproof, and the treatment is good for 1 to 2 years depending on conditions and usage. Because the RF-1048DK is listed as a universal part rather than a vehicle-specific one, confirm that your filter matches the round tapered footprint before ordering. Installation is a simple slip-on task once the filter is out of the airbox. Keep the open top and base seated flush on the filter.
No. The manufacturer states that K&N Drycharger wraps are meant to be run dry, and they can be cleaned with K&N air filter cleaner.
According to the manufacturer, the water-repellent treatment typically lasts 1 to 2 years, depending on conditions and usage.
The manufacturer says the Drycharger is designed to add little restriction to airflow while stopping small particles.
Fitting the wrap is a removal-and-slip-on job. Remove the air filter from the airbox, slide the wrap over the filter with the open top facing the correct direction, and reinstall. Clean it with K&N filter cleaner rather than oil, and check that the elastic openings sit snugly so the wrap does not shift in use. The manufacturer's install sheet for this exact part was not located during research, so check the printed instructions that come with it.
