K&N Engineering RK-3952 Street Metal Air Intake System for Harley-Davidson Touring Motorcycles

K&N Street Metal Air Intake Systems for Harley Davidson® motorcycles replace the restrictive stock OE air cleaner with an oversized K&N High-Flow Air Filter and a high-volume cast aluminum housing. If you're looking for an aggressive appearance but want a significant increase in airflow, resulting in more power, this high-flow air intake system is exactly what your Harley needs. Installation is so simple, it can usually be done in 90 minutes or less. The K&N air filter is washable, reusable, pre-oiled and ready for installation. This intake system features an updated, modern look with an oval-shaped matte black housing. Silver details and sanded fins further enhance the streamlined look. Internal breathers provide a sleek, clean appearance. This air intake has a classic styling with a savage appeal. K&N Street Metal performance air intake systems increase power by replacing the restrictive stock OE air cleaner with a K&N complete performance air intake system. Associated products: E-3988 Custom Air Filter, 99-5000 Filter Care Service Kit Aerosol

• Washable & Reusable Air Filter: Includes a High-Flow Air Filter that can go up to 100,000 miles before cleaning under normal highway driving conditions.
• Washable and reusable K&N High-Flow cotton air filter that provides outstanding performance and protection
• Cast aluminum high-volume, performance air intake housing in black
• Designed to improve throttle response and engine sound
• Built-in breathers replace external OE breathers
• Easy to install, usually in 90 minutes or less
• Integrated internal velocity stack
• Guaranteed to increase horsepower

The K&N Engineering RK-3952 Street Metal Air Intake System replaces the restrictive stock air cleaner on select Harley-Davidson motorcycles with a high-flow performance intake designed to improve airflow, throttle response, and engine sound. Its oversized K&N washable and reusable cotton air filter works with a high-volume cast aluminum housing to support increased engine breathing and reliable filtration.

The system features an oval-shaped matte black housing with silver details and sanded fins for a clean, aggressive appearance. Built-in internal breathers replace external original-equipment breathers, while the integrated internal velocity stack helps streamline airflow into the engine. The pre-oiled filter is ready for installation and may go up to 100,000 miles between cleanings under normal highway driving conditions. Installation is straightforward and can typically be completed in 90 minutes or less using common tools.

Designed for select 2008-2009 Harley-Davidson Touring applications, the K&N Engineering RK-3952 Street Metal Intake System combines durable construction, reusable filtration, and performance-oriented styling. This intake system is EPA compliant and covered by California Air Resources Board Executive Order D-269-59 where applicable. Always verify motorcycle year, model, engine configuration, and local emissions requirements before installation.

What's Included: Street Metal intake housing, K&N High-Flow washable and reusable air filter, internal breather components, mounting hardware, and installation components.

Fitment: Fits select 2008 Harley-Davidson FLHR Road King, FLHRC Road King Classic, FLHRSE4 Screamin' Eagle Road King, FLHT Electra Glide Standard, FLHTC Electra Glide Classic, FLHX Street Glide, and FLTR Road Glide models, plus select 2009 FLHR Road King, FLHRC Road King Classic, FLHT Electra Glide Standard, and related Touring applications. Confirm exact fitment before ordering.

Features:

• Washable and Reusable Air Filter: Includes a pre-oiled K&N High-Flow cotton filter designed for long service life and cleaning intervals of up to 100,000 miles under normal highway driving conditions.
• High-Volume Cast Aluminum Housing: Replaces the restrictive stock air cleaner with a durable matte black housing engineered to support increased airflow.
• Improved Throttle Response and Engine Sound: Performance intake design helps enhance throttle response and delivers a more pronounced intake sound.
• Integrated Internal Breathers and Velocity Stack: Built-in breathers provide a clean appearance while the internal velocity stack helps optimize airflow into the engine.

Fitments:
2008 Harley Davidson FLHR Road King Base
2008 Harley Davidson FLHRC Road King Classic Base
2008 Harley Davidson FLHRSE4 Screamin Eagle Road King Base
2008 Harley Davidson FLHT Electra Glide Standard Base
2008 Harley Davidson FLHTC Electra Glide Classic Base
2008 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2008 Harley Davidson FLHX Street Glide Base
2008 Harley Davidson FLTR Road Glide Base
2009 Harley Davidson FLHR Road King Base
2009 Harley Davidson FLHRC Road King Classic Base
2009 Harley Davidson FLHT Electra Glide Standard Base
2009 Harley Davidson FLHTC Electra Glide Classic Base
2009 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2009 Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base
2009 Harley Davidson FLHX Street Glide Base
2009 Harley Davidson FLTR Road Glide Base
2010 Harley Davidson FLHR Road King Base
2010 Harley Davidson FLHRC Road King Classic Base
2010 Harley Davidson FLHTC Electra Glide Classic Base
2010 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2010 Harley Davidson FLHTCUSE5 CVO Ultra Classic Electra Glide Base
2010 Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base
2010 Harley Davidson FLHX Street Glide Base
2010 Harley Davidson FLHXXX Street Glide Trike Base
2010 Harley Davidson FLTR Road Glide Base
2010 Harley Davidson FLTRX Road Glide Custom Base
2011 Harley Davidson FLHR Road King Base
2011 Harley Davidson FLHRC Road King Classic Base
2011 Harley Davidson FLHTC Electra Glide Classic Base
2011 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2011 Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base
2011 Harley Davidson FLHTK Electra Glide Ultra Limited Base
2011 Harley Davidson FLHX Street Glide Base
2011 Harley Davidson FLHXXX Street Glide Trike Base
2011 Harley Davidson FLTRU Road Glide Ultra Base
2011 Harley Davidson FLTRX Road Glide Custom Base
2012 Harley Davidson FLHR Road King Base
2012 Harley Davidson FLHRC Road King Classic Base
2012 Harley Davidson FLHTC Electra Glide Classic Base
2012 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2012 Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base
2012 Harley Davidson FLHTK Electra Glide Ultra Limited Base
2012 Harley Davidson FLHX Street Glide Base
2012 Harley Davidson FLTRU Road Glide Ultra Base
2012 Harley Davidson FLTRX Road Glide Custom Base
2013 Harley Davidson FLHR Road King Base
2013 Harley Davidson FLHRC Road King Classic Base
2013 Harley Davidson FLHTC Electra Glide Classic Base
2013 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2013 Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base
2013 Harley Davidson FLHTK Electra Glide Ultra Limited Base
2013 Harley Davidson FLHX Street Glide Base
2013 Harley Davidson FLTRU Road Glide Ultra Base
2013 Harley Davidson FLTRX Road Glide Custom Base
2014 Harley Davidson FLHR Road King Base
2014 Harley Davidson FLHTK Electra Glide Ultra Limited Base
2014 Harley Davidson FLHX Street Glide Base
2014 Harley Davidson FLHXS Street Glide Special Base
2015 Harley Davidson FLHR Road King Base
2015 Harley Davidson FLHTK Ultra Limited Base
2015 Harley Davidson FLHTKL Ultra Limited Low Base
2015 Harley Davidson FLHX Street Glide Base
2015 Harley Davidson FLHXS Street Glide Special Base
2015 Harley Davidson FLRT Freewheeler Base
2015 Harley Davidson FLTRX Road Glide Base
2015 Harley Davidson FLTRXS Road Glide Special Base
2016 Harley Davidson FLHR Road King Base
2016 Harley Davidson FLHTK Ultra Limited Base
2016 Harley Davidson FLHTKL Ultra Limited Low Base
2016 Harley Davidson FLHX Street Glide Base
2016 Harley Davidson FLHXS Street Glide Special Base
2016 Harley Davidson FLRT Freewheeler Base
2016 Harley Davidson FLS Softail Slim Base
2016 Harley Davidson FLSS Softail Slim S Base
2016 Harley Davidson FLSTC Heritage Softail Classic Base
2016 Harley Davidson FLSTF Fat Boy Base
2016 Harley Davidson FLSTFB Fat Boy Lo Base
2016 Harley Davidson FLSTFBS Fat Boy S Base
2016 Harley Davidson FLSTN Softail Deluxe Base
2016 Harley Davidson FLTRX Road Glide Base
2016 Harley Davidson FLTRXS Road Glide Special Base
2016 Harley Davidson FXSB Breakout Base
2017 Harley Davidson FLS Softail Slim Base
2017 Harley Davidson FLSS Softail Slim S Base
2017 Harley Davidson FLSTC Heritage Softail Classic Base
2017 Harley Davidson FLSTF Fat Boy Base
2017 Harley Davidson FLSTFB Fat Boy Lo Base
2017 Harley Davidson FLSTFBS Fat Boy S Base
2017 Harley Davidson FLSTN Softail Deluxe Base
2017 Harley Davidson FXSB Breakout Base

Air Freight Prohibited: false
Not Carb Approved: false
Carb Eo Number: D-269-59
Ltl Freight Required: false
Prop 65: Y
Part Type: powersports
Epa: Compliant
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1