K&N Engineering
K&N Universal Custom Air Filter - Oval Shape 9.313in OD / 2.375 Height - E-3988
- SKU:
- KNNE-3988
- UPC:
- 024844366818
- MPN:
- E-3988
- Availability:
- Regularly stocked product
Description
Do K&N Air Filters fit specific Harley-Davidson motorcycles?
K&N Custom Air Filters are specifically designed as replacement air filters for select K&N RK Series air cleaner assemblies for Harley-Davidson motorcycles.
Can K&N Air Filters increase horsepower?
This K&N Custom Air Filter is engineered to increase horsepower and acceleration for a more responsive motorcycle ride.
The K&N Custom Air Filter is designed for specific Harley-Davidson motorcycles, promising an 8/8 score for Street Performance. Its washable and reusable construction ensures long-term value and superior engine protection through excellent filtration. Trust K&N Engineering for a direct-fit upgrade that enhances your motorcycle's power and acceleration with confidence.
Key Features
- increase horsepower and acceleration
- excellent filtration
- washable and reusable
- replacement air filter for specific K&N RK Series air cleaner assemblies for Harley-Davidson motorcycles
- covered by the famous K&N Million-Mile Limited Warranty
Why Choose the KN Custom Air Filter
Delivers exhilarating horsepower and quicker acceleration for a more responsive ride.
Achieves superior engine protection with advanced filtration, keeping your engine cleaner.
Provides long-term value and sustainability by being easily washable and reusable.
Transforms your Harley-Davidson's performance with a direct-fit upgrade for RK Series assemblies.
Who Is This For?
Street Performance — 8/10
Increases horsepower and acceleration for street use.
Engine Performance — 9/10
Directly claims to increase horsepower and acceleration.
Racing Competition — 7/10
Performance gains support racing competition needs.
Easy DIY Install — 8/10
Drop-in install type simplifies installation process.
Track / Autocross — 7/10
Performance gains benefit track and autocross events.
Visual / Aesthetic Upgrade — 5/10
Premium performance position suggests aesthetic appeal.
Frequently Asked Questions
Will a K&N Custom Air Filter fit my Harley-Davidson?
Confirming fitment with your specific vehicle is essential for optimal integration. This K&N Custom Air Filter is designed as a drop-in replacement for specific K&N RK Series air cleaner assemblies, ensuring a precise match for those applications. Trust in K&N's meticulous engineering for guaranteed compatibility with your designated RK Series setup.
How difficult is it to install a K&N Custom Air Filter?
Installation is straightforward with a drop-in design, making it an easy DIY process. This filter is engineered for a seamless integration, mirroring the ease of a standard replacement part. Enjoy a quick and effective upgrade to your motorcycle's performance with minimal effort.
Can a K&N Custom Air Filter improve my motorcycle's performance?
Experience exhilarating horsepower and quicker acceleration with a score of 9 for Engine Performance. This filter directly contributes to enhanced power output for a more responsive ride. Achieve a noticeable performance uplift designed for demanding motorcycle use.
What is the warranty on a K&N Custom Air Filter?
This K&N Custom Air Filter is protected by the famous K&N Million-Mile Limited Warranty, offering unparalleled long-term confidence. This extensive warranty underscores the product's exceptional durability and reliable performance. Ride with peace of mind knowing your investment is covered for the long haul.
Additional Resources
Important Notices
⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Additional Information
Clearance Item: |
N |
MPN: |
E-3988 |
Proposition 65: |
Y |
Case Lot Quantity: |
1 |
Category: |
Air Filters>Air Filters - Direct Fit |
Universal Fitment: |
Y |
Install Type: |
Drop-In |
Product Level: |
Premium Performance |
Street Performance: |
8/10 |
Engine Performance: |
9/10 |
Racing Competition: |
7/10 |
Easy DIY Install: |
8/10 |
Track / Autocross: |
7/10 |
Visual / Aesthetic Upgrade: |
5/10 |