The K&N RF-1041DR is a red Drycharger pre-filter wrap made from silicone-treated polyester. It is made to cover K&N Air Filters or Personal Watercraft Flame Arrestors. Its round tapered profile suits K&N's universal clamp-on filters, and it is listed at a 7.5-inch base, 5-inch top, and 7.5-inch height. The uniform micron sized openings allow high air flow, so the wrap is a practical choice for riders who run an open K&N element in wet or dusty conditions.
Compared with a bare filter, the wrap is worth the cost when mud, road spray, or fine grit is the main threat. It will also stop small dirt particles; yet add little restriction to the airflow of the filter. The water-repellent finish is not a permanent barrier: the DryCharger is water repellent, not water proof, and depending on conditions and usage the treatment is good for 1 to 2 years. Owners on user forums generally pair this kind of wrap with regular filter cleaning, since it extends service intervals rather than eliminating them. Search terms this part targets include K&N RF-1041DR drycharger, round tapered universal filter wrap 7.5 base 5 top, and water repellent pre-filter sleeve for K&N.
The manufacturer lists the RF-1041 universal filter at a 7.5-inch base, 5-inch top, and 7.5-inch height, which matches the wrap's listed dimensions. Confirm your filter's measurements before ordering, since this wrap is not listed for specific vehicles.
No. The manufacturer describes the Drycharger as water repellent, not waterproof, and the treatment lasts about 1 to 2 years depending on conditions and usage.
No. The manufacturer lists this wrap with an open top.
This is a slip-on accessory, so no special tools are needed beyond removing the air box cover to access the filter. Remove the filter, fit the wrap over it so the stitched elastic openings seat securely, then reinstall the filter. Check that the wrap sits evenly around the element before closing the air box, and recheck it after washing or re-oiling the filter. K&N's guidance for its DryCharger wraps notes they can be cleaned with K&N air filter cleaner, which helps keep the water-repellent finish performing.
