This K&N RK Series Air Intake System was designed to get more horsepower from your Twin Cam Harley-Davidson engine. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover.
The K&N RK-3930 Air Intake System was designed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, this RK Series assembly includes an innovative powder coated billet aluminum back plate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover.
- Increases horsepower
- Washable and reusable
- Fits inside stock cover
- Provides increased air flow
Application Summary:
| Year |
Make/Model |
| 2008-2013 |
Harley-Davidson FLHR Road King |
| 2008-2013 |
Harley-Davidson FLHRC Road King Classic |
| 2008 |
Harley-Davidson FLHRSE4 Screamin Eagle Road King |
| 2008-2009 |
Harley-Davidson FLHT Electra Glide Standard |
| 2008-2013 |
Harley-Davidson FLHTC Electra Glide Classic |
| 2008-2013 |
Harley-Davidson FLHTCU Electra Glide Ultra Classic |
| 2010 |
Harley-Davidson FLHTCUSE5 CVO Ultra Classic Electra Glide |
| 2009-2013 |
Harley-Davidson FLHTCUTG Tri Glide Ultra Classic |
| 2010-2013 |
Harley-Davidson FLHTK Electra Glide Ultra Limited |
| 2008-2013 |
Harley-Davidson FLHX Street Glide |
| 2010-2011 |
Harley-Davidson FLHXXX Street Glide Trike |
| 2008-2010 |
Harley-Davidson FLTR Road Glide |
| 2011-2013 |
Harley-Davidson FLTRU Road Glide Ultra |
| 2010-2013 |
Harley-Davidson FLTRX Road Glide Custom |
| Attributes |
| Air Box Included |
No |
| Air Filter Color |
Red |
| Air Filter Height |
1.625 in (41 mm) |
| Air Filter Inside Diameter |
6.188 in (157 mm) |
| Air Filter Material |
Cotton Gauze |
| Air Filter Outlet Shape |
Not Flanged |
| Air Filter Shape |
Oval |
| Air Filter Washable |
Yes |
| Alternate Part Number |
RK-3930 |
| ASIN |
B001NAP2Q8 |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| CARB EO Number |
D-269-55/59 |
| Clamp Color/Finish |
Not Applicable |
| Clamp Material |
No Clamps Required |
| Clamp Style |
No Clamps Required |
| Clamps Included |
No Clamps Included |
| Color / Finish |
Red Filter, Aluminum Top |
| Country of Origin (Primary) |
US |
| Couplers Included |
None |
| Emission Code |
Legal US |
| Estimated Horsepower Gain |
8.43 HP @ 3700 RPM |
| Harmonized Tariff Code (Schedule B) |
8421310000 |
| Hazardous Material Code |
N |
| Horse Power Increase |
8 HP |
| Inlet Diameter |
2.469 in (63 mm) |
| Life Cycle Status Code |
Available to Order |
| Mass Air Flow Sensor Adapter Included |
No |
| Mounting Hardware Included |
Yes |
| NAFTA Preference Criterion Code |
B |
| Neck Flange |
2.469 in (63 mm) |
| Oil Included |
Yes |
| Overall Height |
1.875 in (48 mm) |
| Package Material |
Paperboard |
| Package Type |
Box |
| Product Box Height |
4.88 in (124 mm) |
| Product Box Length |
11.75 in (298 mm) |
| Product Box Width |
9.5 in (241 mm) |
| Product Style |
Motorcycle Intake System |
| Replacement Filter |
E-3972 |
| RPM |
3700 |
| SDR Required Flag |
N |
| Size |
9 Inch |
| Street Legal In All US States |
Yes, Legal for use in all 50 states. |
| Style |
Oval |
| Top Material |
Aluminum |
| Top Style |
Metal |
| TUV Approved (Europe) |
No, No |
| Warranty |
No-Hassle Lifetime Limited |
| Warranty Time |
12 |
| Weight |
3.5 lb (1.6 kg) |
| GTIN |
00024844200556 |
