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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
Read More
K&N Engineering
Cold Air Intakes, Air Filters, Oil Filters & Performance Filtration Browse premium K&N Engineering performance parts and filters at Black Ops Auto Works, including cold air intakes, replacement air filters, universal air filters, oil filters, cabin air filters, fuel filters, filter cleaning kits, air intake accessories, and performance filtration upgrades for cars, trucks, SUVs, diesel applications, off-road vehicles, and performance builds. K&N is one of the most recognized names in automotive filtration and airflow technology, trusted by enthusiasts who want better airflow, reusable filter performance, and dependable engine protection. Why Choose K&N Engineering K&N products are engineered to improve airflow and support performance-focused driving across street, towing, off-road, and high-performance applications. Popular reasons drivers choose K&N include: Improved airflow and throttle response Reusable, washable air filters Long-term filtration value Veh...
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