Upgrading your Harley’s air cleaner is one of the most effective ways to boost engine performance. A stage 2 air cleaner increases airflow, helping your motor breathe easier and deliver more power.
This guide compares three popular high-flow air filters for Harley Davidson models. Whether you ride a Touring, Softail, or Dyna, you’ll find a pick that fits your bike and riding style.
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K&N Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fi...
Best forReusable high-flow performance
- Pre-oiled and ready to install
- Boosts horsepower and acceleration
ConsiderLimited to specific model years
XMMT Red Sucker High Flow Stage 1 Air Cleaner Filter Intake Element For Har...
Best forBudget-friendly stage 1 upgrade
- Increases horsepower and torque
- Direct replacement for stock filter
ConsiderNot reusable; disposable design
High Performance Air Filter HD-0800 For Harley Davidson 1999-2007 Dyna Seri...
Best forWide model compatibility
- Replaces multiple OEM part numbers
- Fits many Dyna, Softail, Touring
ConsiderRequires part finder check
K&N Engine Air Filter – Reusable Power Boost
Brand: K&N
A reliable, reusable filter that boosts power for select Harleys.
The K&N Engine Air Filter is a premium, vehicle-specific upgrade for 2001-2008 Harley Davidson models including Screamin Eagle, Dyna, Road King, and Ultra Classic Electra Glide. It arrives pre-oiled and ready to install, so you can get it on your bike without extra steps. This filter is designed to boost horsepower and acceleration by increasing airflow while maintaining exceptional filtration.
One standout feature is its reusability: you can clean and re-oil this filter multiple times, saving money over disposable alternatives. The high air flow design supports stage 2 performance builds, and the easy installation means you can swap it out in minutes. For riders who want a durable, long-term upgrade that delivers consistent gains, this K&N filter is a solid choice.
- Pre-oiled and ready to install
- Boosts horsepower and acceleration
- Cleanable and reusable
- Limited to specific model years
- Higher upfront cost
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- Fit Type: Vehicle Specific Easy Installation: Pre-oiled and ready to install
- Designed to boost horsepower and rate of acceleration
- Can be cleaned and used again
- High air flow with exceptional filtration
- Lasts up to 50,000 miles before cleaning is required depending on driving conditions
XMMT Red Sucker High Flow Filter – Budget Stage 1
Brand: XMMT
An economical high-flow filter that boosts performance without breaking the bank.
The XMMT Red Sucker High Flow Air Filter is designed for Harley Big Twin Cam Touring (1999-2007), Softail (2000-2015), and Dyna (1999-2017) models, excluding certain later years. It uses resin filter paper and a metal construction to provide increased horsepower and torque. This filter serves as a direct replacement for your stock element, making it a straightforward upgrade for stage 1 or stage 2 setups.
Its high-flow design improves engine breathing, which can enhance throttle response and overall performance. The red color adds a custom look under the cover. While it is not reusable like some premium filters, it offers an affordable way to get better airflow. If you are on a budget and need a reliable replacement element for your high-flow kit, this XMMT filter delivers solid value.
- Increases horsepower and torque
- Direct replacement for stock filter
- Affordable price point
- Not reusable; disposable design
- Limited fitment for later models
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- Fitment:Fits:1999-2017 Dyna, 2000-2015 Softail, & 1999-2007 Harley Touring (except '08-'16 Touring/Trike, '16-'17 Softail, '16-'17 FXDLS, '11-'12 FLSTSE, '13-'14 FXSBSE & '14-'15 FLSTNSE)
- Feature:High-flow air filters are available as a replacement for your stock motorcycle air filter element.
- Material: Resin filter paper + Metal
- Designed to provide increased horsepower and torque
- Warranty:XMMT store offer 24 hours customer service and 30 days warranty. If you meet any problem about installation and items, please feel free to contact us.
MINSTAR High Performance Filter HD-0800 – Wide Fit
Brand: MINSTAR
A versatile replacement filter that fits a broad range of Harley models.
The MINSTAR High Performance Air Filter HD-0800 is a replacement element for Harley Davidson models from 1999-2007 Dyna, 2000-2015 Softail, and 1999-2007 Touring bikes equipped with a high-flow cleaner kit. It replaces part numbers 29442-99A through 29442-99E and KN HD-0800. This filter fits a wide range of specific models including Road King, Fat Boy, Softail Deluxe, and Rocker C.
Designed for use with high-flow cleaner kits, it helps maximize airflow for stage 2 builds. The construction uses quality materials to ensure consistent filtration and performance. Before purchasing, use Amazon’s part finder to confirm compatibility with your exact bike. For riders with multiple Harley models or those needing a direct replacement for a popular part number, this MINSTAR filter offers broad coverage and reliable performance.
- Replaces multiple OEM part numbers
- Fits many Dyna, Softail, Touring
- Works with high-flow kits
- Requires part finder check
- Not pre-oiled like some rivals
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- Replacement Part Number : 29442-99A /29442-99B /29442-99C /29442-99D /29442-99E /KN HD-0800. Please Use Amazon's Part Finder Function To Confirm If This Air Filter Will Fit Your Vehicle Before Purchase!
- Fits : Harley Davidson FLHR Road King 1999-2007★ FLHRC Road King Classic 2002-2006★ FLHRS Road King Custom 2004-2007★ FLHRSI Road King Custom 2004-2006★ FLHT Electra Glide Standard 1999-2006★ FLHTC Electra Glide Classic 1999-2007★ FLHTCI Electra Glide Classic 2002-2006★ FLHTI Electra Glide Standard 2003-2006★ FLHX Street Glide 2006 2007★ FLSTC Heritage Softail Classic 2000-2015★ FLSTCI Heritage Softail Classic 2001-2006★
- Fits : Harley Davidson FLSTF Fat Boy 2000-2015★ FLSTFB Fat Boy Lo 2010-2015★ FLSTFI Fat Boy 2002-2006★ FLSTN Softail Deluxe 2005-2015★ FLSTNI Softail Deluxe 2005 2006★ FLSTS Heritage Springer 2000-2003★ FLSTSC Softail Springer Classic 2005 2006★ FLSTSCI Softail Springer Classic 2005-2007★ FLSTSI Heritage Springer 2001-2003★ FLTRI Road Glide 2004-2006★ FLTR Road Glide 1999-2003 2007★ FXCW Rocker 2008 2009★
- Fits : Harley Davidson FXCWC Rocker C 2008-2011★ FXD Dyna Super Glide 1999-2005 2007★ Street Bob 2006 2007★ Super Glide Custom 2005-2007★ FXDI Dyna Super Glide 2004-2006★ FXDL Dyna Low Rider 1999-2007★ FXDS-Conv Dyna Convertible 1999 2000★ FXDWG Dyna Wide Glide 1999-2006★ FXDX Dyna Super Glide Sport 1999-2005★ FXDXI Dyna Super Glide Sport 2004 2005★ FXSB Breakout 2013-2015★
- Fits : Harley Davidson FXST Softail Standard 2000-2005 2007★ FXSTB Night Train 2000-2009★ FXSTBI Night Train 2001-2006★ FXSTC Softail Custom 2007-2010★ FXSTD Softail Deuce 2000-2007★ FXSTDI Softail Deuce 2001-2006★ FXSTI Softail Standard 2001-2006★ FXSTS Springer Softail 2000-2006★ FXSTSI Springer Softail 2001-2006★
Buyer’s Guide: What to Consider
Choosing the right stage 2 air cleaner involves fitment, airflow, and maintenance. Here are five key factors to consider before buying.
- Fitment: Check your Harley's year and model. Each filter fits specific bikes; use the part finder or compatibility list to ensure a proper match.
- Airflow vs. Filtration: High-flow filters let more air in for power, but must still trap dirt. Look for designs that balance performance with engine protection.
- Reusability: Some filters are cleanable and reusable, saving money long-term. Others are disposable and need replacement after a set mileage.
- Installation: Pre-oiled filters are ready to install out of the box. Others may require oiling or additional steps. Consider your comfort with DIY work.
- Build Quality: Materials like metal frames and resin paper affect durability. A well-built filter withstands vibration and harsh riding conditions.
Conclusion
Each of these three air filters offers distinct benefits for your Harley. The K&N is ideal if you want a reusable, high-performance upgrade. The XMMT provides an affordable entry into better airflow. The MINSTAR covers a wide range of models with a reliable replacement.
For most riders, the K&N’s combination of power gains and reusability makes it a top pick. But if budget or fitment is your priority, the XMMT or MINSTAR are excellent alternatives. Choose based on your bike and riding needs.