SKU: RK-3910-1 | UPC: 024844301697
K&N Oval Red 9in Intake System for 1999-2012 Harley-Davidson Twin Cam Models
The K&N RK-3910-1 intake system delivers more horsepower and torque to Twin Cam Harley-Davidson engines through increased airflow. This kit fits numerous 1999-2012 Harley Touring Dyna and Softail models including Road King Super Glide Fat Boy and more. Built with a high-flow air filter powder-coated billet aluminum back plate and dyno-tuned velocity stack it maintains factory appearance while enhancing engine performance.
Key Features
- Larger 9in Oval Red Air Filter: Provides significant airflow increase over stock for better throttle response and power gains
- Powder-Coated Billet Aluminum Back Plate: Eliminates external breathers for cleaner look and directs air efficiently into the engine
- Dyno-Tuned Velocity Stack: Precisely engineered to optimize air velocity and volume feeding the throttle body
- Excellent Air Filtration: K&N high-flow media traps dirt dust and debris while allowing maximum air passage
- Washable Reusable Filter: Clean and re-oil for repeated use extends service life reduces costs over disposable filters
Product Notes
- Retains stock air cleaner cover for OEM appearance
- EPA compliant design ensures legal street use
- Product weight 3.9 lbs ships in 12in x 12in x 7in box
Installation Notes
- Professional installation recommended.
- Bolt-on design replaces stock airbox assembly in under 1 hour
- Compatible with stock throttle body and mounting hardware no modifications required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1999-2002 | Harley-Davidson | FLTR Road Glide | Base |
| 2007 | Harley-Davidson | FLTR Road Glide | Base |
| 2002-2006 | Harley-Davidson | FLTRI Road Glide | Base |
| 2008-2009 | Harley-Davidson | FXCW Rocker | Base |
| 2008-2011 | Harley-Davidson | FXCWC Rocker C | Base |
| 1999-2007 | Harley-Davidson | FLHR Road King | Base |
| 2007 | Harley-Davidson | FLHRC Road King Classic | Base |
| 2002-2006 | Harley-Davidson | FLHRCI Road King Classic | Base |
| 2003-2006 | Harley-Davidson | FLHRI Road King | Base |
| 1999-2007 | Harley-Davidson | FXD Dyna Super Glide | Base |
| 2007 | Harley-Davidson | FXDB Street Bob | Base |
| 2006 | Harley-Davidson | FXDBI Street Bob | Base |
| 2005-2007 | Harley-Davidson | FXDC Super Glide Custom | Base |
| 2000-2003 | Harley-Davidson | FLSTS Heritage Springer | Base |
| 2005-2007 | Harley-Davidson | FLSTSC Softail Springer Classic | Base |
| 2000-2007 | Harley-Davidson | FXSTD Softail Deuce | Base |
| 2000-2009 | Harley-Davidson | FXST Softail Standard | Base |
| 2000-2012 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 2000-2012 | Harley-Davidson | FLSTF Fat Boy | Base |
| 2010-2012 | Harley-Davidson | FLSTFB Fat Boy Lo | Base |
Why Choose K&N?
- Over 60 years developing high-performance air filters for motorcycles
- Dyno-tested designs deliver measurable power gains on Twin Cam engines
- Precision-machined components ensure perfect fit and durability
Frequently Asked Questions
- Q: Will this fit my 2004 Harley Road King FLHR?
A: Yes RK-3910-1 fits 1999-2007 FLHR Road King Base models with Twin Cam 88 engines - Q: What material is the back plate made from?
A: Billet aluminum with powder coat finish for corrosion resistance and heat dissipation - Q: What is the warranty on the air filter?
A: Million mile limited warranty when serviced per K&N instructions
Shipping &. Handling
- Method: UPS Ground or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure foam-protected box 12in x 12in x 7in
- Weight: 3.9 lbs product 4.7 lbs shipping
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