- Designed for Harley-Davidson motorcycles
- Increase horsepower and torque
- Extra tall air filter design provides even more air flow and longer service intervals than standard RK-series air intakes
- Easy to install
- Made in the U.S.A.
- Backed by K&N Million Mile Limited Warranty
RK-3947X K&N Intake System-Harley Davidson
$299.99 Original price was: $299.99.$97.99Current price is: $97.99.
SKU: RK-3947X Categories: Air Filters, Powersports
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K&N’s Street Metal Series High-Flow Air Intake Systems provide attractive styling, offer increased airflow and deliver more horsepower & torque to your Harley-Davidson motorcycle. This series completely eliminates the stock OE air cleaner and replaces it with a high-flow K&N air intake system, increasing power. This intake system uses an extra tall K&N air filter, which means even more air flow and longer service intervals than standard RK-series air intake filters. Larger or custom engine builds most often benefit from higher levels of air flow, so the extra tall filter designs are a perfect choice for more powerful bikes. The K&N high-flow air filter is washable, reusable, pre-oiled and ready for installation, making an already easy install even faster. Just how fast? Less than 90 minutes, in most cases. The sturdy, custom aluminum backing plate mounts directly to the throttle body via an aluminum integrated, internal-run breather system. A durable mounting gasket is also included to help absorb vibration. The brilliant shine on this custom flare-shaped chrome cover give this air intake makes an impression on and off the road.
| Estimated Horsepower Gain | 8.1 HP @ 4.493 RPM |
|---|---|
| TUV Approved (Europe) | No |
| Product Box Width | 9.5 in (241 mm) |
| Product Box Length | 11.75 in (298 mm) |
| Product Box Height | 4.88 in (124 mm) |
| Weight | 4.3 lb (2 kg) |
| Top Material | Chrome |
| Overall Height | 6.25 in (159 mm) |
| Street Legal In All US States | See Vehicle Applications |
| Replacement Filter | E-3986 |
| CARB EO Number | D-269-59 |
| Air Filter Height | 3.125 in (79 mm) |
| Product Style | Motorcycle Intake System |
| Warranty | No-Hassle Lifetime Limited |
| Air Filter Material | Cotton Gauze |
| Air Filter Color | Red |
| Mounting Hardware Included | Yes |
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