The K&N RC-4630DK is a black Drycharger pre-filter wrap sized for K&N round tapered air filters. It is made from silicone-treated polyester with stitched elastic openings, and the manufacturer says its uniform micron-sized openings allow high airflow while limiting how much water reaches the filter. Because the wrap sits outside the filter element, it takes the first hit from road spray, puddle splash, and dust, which keeps the paper or cotton media cleaner for longer. For a track or off-road enthusiast running a K&N filter on a wet-weather or dusty setup, the wrap is a low-cost way to extend service intervals without giving up the filter's flow. Owners on user forums often look for a round tapered Drycharger wrap for wet track day and mud-prone intake setups, and this 5.5 in base, 4.5 in top, 6.5 in tall size is one of the more common round tapered fits.
Compared with running a bare filter, the silicone treatment repels water so the filter stays drier in rain and splash conditions. The manufacturer is clear that it is water repellent rather than waterproof, and that the treatment typically lasts 1 to 2 years depending on conditions and use. The wrap is custom-sized for specific K&N filters, so buyers should confirm the filter's base, top, and height match these dimensions before ordering. The DIY side is simple: the wrap is meant to be run dry and can be cleaned with K&N's Power Kleen air filter cleaner, so it can be pulled off, cleaned, and reinstalled during routine filter service.
No. The manufacturer describes the Drycharger as water repellent, not waterproof. The water repellent treatment typically lasts 1 to 2 years, depending on conditions and usage.
Yes. The manufacturer states that Drycharger wraps are meant to be run dry and can be cleaned with K&N Power Kleen air filter cleaner.
No. The manufacturer says Drycharger pre-filter wraps are custom made to fit specific K&N air filters. The RC-4630DK is listed as a round tapered wrap with a 5.5 in base, 4.5 in top, and 6.5 in height, so confirm your filter's dimensions match before buying.
This is a slip-on pre-filter rather than a hardware kit, so no special tools are expected. The general process is to remove the K&N filter from the intake, fit the wrap over the filter element, and reinstall the assembly. The elastic openings are what keep the wrap in place, so make sure it sits evenly and fully covers the filter before reinstalling. Confirm the base, top, and height against your filter before you start, since a mismatched wrap will not seat correctly.
