SKU: E-3040 | UPC: 024844199348
K&N E-3040 Replacement Element for RK-3929 Custom Air Filter – Fits 2004-2021 Harley-Davidson Sportster
The K&N E-3040 is a washable reusable oval air filter that replaces the element in RK-3929 custom air cleaner assemblies on select 2004-2021 Harley-Davidson Sportster models. It delivers higher airflow for gains in horsepower and acceleration while protecting your engine with four-layer cotton gauze filtration. Covered by K&N Million Mile Limited Warranty this direct-fit filter maintains peak performance over time.
Key Features
- High Airflow Design: Boosts horsepower and quicker throttle response through increased air volume into the engine
- Four-Layer Cotton Gauze Media: Traps dirt and debris for engine protection without restricting flow
- Washable and Reusable: Clean every 50000 miles or yearly then re-oil for like-new performance
- Direct RK-3929 Replacement: Exact oval shape with 5 in x 3 in outside diameter 2.5 in inside diameter and 1.25 in height for seamless fit
- Million Mile Limited Warranty: Lifetime coverage when used and maintained properly
Product Notes
- Use K&N air filter cleaning kit PN 9925DP for maintenance
- Pre-oiled from factory for immediate installation
- Packaged in protective box measuring 6.75 x 4.75 x 2.5 inches
Installation Notes
- Professional installation recommended.
- Remove old element from RK-3929 housing and drop in E-3040 no modifications needed
- Compatible with stock RK-3929 hardware and chrome lid
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2009 | Harley-Davidson | XL883C | Sportster Custom |
| 2004-2011 | Harley-Davidson | XL1200C | Sportster Custom |
| 2004 | Harley-Davidson | XL1200R | Sportster Roadster |
| 2009-2013 | Harley-Davidson | XL883N | Iron 883 |
| 2010-2013 | Harley-Davidson | XL883L | Sportster Low/SuperLow |
| 2010-2013 | Harley-Davidson | XL1200L | Sportster Low |
| 2009 | Harley-Davidson | XL1200N | Nightster |
Why Choose K&N?
- Trusted by millions of riders for air filters since 1969
- Dyno-tested gains in power on Harley engines
- Engineered in USA with precise measurements for Sportster fit
Frequently Asked Questions
- Q: Will the E-3040 fit my 2008 Harley Sportster Custom XL883C with RK-3929?
A: Yes it is a direct replacement for the RK-3929 element on 2004-2009 XL883C models - Q: What filter media does it use?
A: Four layers of oiled cotton gauze pleated over steel mesh for high flow and dirt-holding capacity - Q: How is the warranty honored?
A: Million Mile Limited Warranty covers defects in materials when cleaned using K&N methods contact K&N for claims
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Cardboard box 6.75 x 4.75 x 2.5 inches
- Weight: 0.6 lbs
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