The K&N replacement air filter for RK Series air cleaner assemblies is designed to increase horsepower and acceleration while providing excellent filtration. The air filter is washable and reusable and designed to be used as a replacement air filter for specific K&N RK Series air cleaner assemblies for Harley-Davidson motorcycles. The air filter is covered by the famous K&N Million-Mile Limited Warranty.
| Automotive Item Grade | High Performance |
| Base Outside Length | 10.000 in. (254mm) |
| Base Outside Width | 6.000 in. (152mm) |
| Color | Heather Red |
| Filter Material | Cotton Gauze |
| Flange Angle | 0 Degree |
| Frame Design | Flexible |
| Inner Wire | No |
| Inside Diameter | N/A |
| Item Height | 2.375 in. (60mm) |
| Item Weight | 1.100 lbs. (0.5 kg) |
| Machine Washable | Yes |
| Number of Flanges | None |
| Oil Included | Filter Is Pre-Oiled |
| Outside Diameter | 9.313 in. (237mm) |
| Package Contents | 1 Air Filter |
| Package Material | Paperboard |
| Package Quantity | 1 |
| Package Type | Box |
| Pre-Screened | No |
| Prop 65 (C, R or CR) | CR |
| Prop 65 Warning Label | https://www.knfilters.com/images/l/prop65.jpg |
| Shape | Oval Tapered |
| Title | K&N E-3988 Custom Air Filter |
| Top Outside Length | 8.000 in. (203mm) |
| Top Outside Width | 5.000 in. (127mm) |
| WARNING CA Proposition 65 | Yes |
| WARNING CA Proposition 65 Message | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
WARNINGThis product can expose you to chemicals, including WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
K&N
K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide...
K&N
K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide...
K&N
K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide...
K&N
K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide...
K&N
K&N XD air filters use a Deep Pile Design, Extra Fine Weave Grade Cotton and alternate geometries for added efficiency and capacity for off-road conditions. This extra thick filtering medium...
