K&N High-Flow Engine Air Filter for 2001–2008 Harley-Davidson HD-0800 — Washable, Pre-Oiled Performance

High-flow K&N HD-0800 engine air filter boosts airflow for select 2001–2008 Harley-Davidson models while being washable and reusable. K&N designed this premium, vehicle-specific air filter to deliver improved breathing for compatible Harley-Davidson engines without the recurring cost of disposable filters. Engineered to fit the factory airbox, pre-oiled and ready to install, the HD-0800 combines high airflow and durable filtration media to help maintain performance over long service intervals. Backed by K&N’s 10-Year/Million Mile Limited Warranty and developed using motorsport testing, this filter is intended as a long-lasting replacement for paper elements on many Screamin’ Eagle, Dyna, Road King, Electra Glide, Fat Boy and other select models.

Which Harley-Davidson models does this K&N filter fit?

The HD-0800 is made for specific Harley-Davidson Screamin’ Eagle and select standard models built between 2001 and 2008. Confirm fitment against your bike’s year and model before purchase to ensure compatibility with the factory airbox and intake system.

• 2007–2008 FXDSE and FXDSE2 Screamin’ Eagle Dyna
• 2007 FLHRSE3 Screamin’ Eagle Road King; 2007 FLHTCUSE2 Ultra Classic Electra Glide
• 2007 FXSTSSE and FXSTSSE2 Screamin’ Eagle Softail Springer
• 2005 FLHTCSE2 Electra Glide 2; 2005 FLSTFI Fat Boy F/I 15th Anniversary; 2005 FLSTFSE Screamin’ Eagle Fat Boy
• 2001 FLTRSEI2 Screamin’ Eagle Road Glide 2 F/I

How does this filter affect performance and maintenance?

The HD-0800 uses a high-flow multi-layer media that allows more air into the engine compared with disposable paper filters, which can help engine responsiveness under load. It’s pre-oiled so installation is quick, and because the element is washable and reusable you replace it far less frequently than single-use filters.

• High airflow media designed to support horsepower and throttle response
• Lasts up to 50,000 miles between cleanings under normal conditions
• Pre-oiled for immediate installation—no separate oil required
• Washable and reusable to reduce waste and long-term cost

What are the installation and care steps?

Installation typically takes only minutes since the filter is made to drop into the factory airbox without modification. For routine care, K&N cleaning kits restore filtration efficiency; follow the provided cleaning interval and instructions specific to riding conditions.

• Install directly in the factory airbox—no trimming or adapters needed
• Use K&N cleaning and re-oiling kit for maintenance to preserve filtration
• Inspect during regular service—clean sooner in dusty or off-road conditions
• Keep a cleaning interval record; up to 50,000 miles typical before cleaning

Does this filter come with warranty and environmental benefits?

K&N backs the HD-0800 with a 10-Year/Million Mile Limited Warranty, reflecting confidence in materials and workmanship. Because the element is reusable, it reduces disposable-filter waste, offering an eco-friendlier option over throwaway paper filters.

• 10-Year/Million Mile Limited Warranty for registered products
• Washable design reduces landfill contributions from disposable filters
• Durable construction tested in motorsport environments for reliability

Who is this for: The K&N HD-0800 is aimed at Harley-Davidson riders who own compatible 2001–2008 Screamin’ Eagle, Dyna, Road King, Electra Glide, Fat Boy or Softail Springer models and want a direct-fit upgrade that improves airflow, lowers ongoing filter costs, and offers easy maintenance. It’s especially well suited to owners who prefer track-proven components or who ride frequently in varied conditions and want a long-lasting filter option.

FAQ

Q: Is the HD-0800 washable and reusable?

A: Yes. The HD-0800 is washable, reusable, and designed to be cleaned with K&N cleaning kits for long-term use.

Q: How often does the filter need cleaning?

A: Under normal use up to 50,000 miles before cleaning; inspect sooner in dusty or harsh conditions.