Hiflofiltro Air Filter for Honda ST1100 1990-2002 HFA1911

The stock air filter on your ST1100 is a compromise between cost and performance—and your engine knows it. The Hiflofiltro HFA1911 swaps that restriction for a high-flow design that improves throttle response and maintains clean air delivery without sacrificing filtration. Install it once, forget about it, and enjoy the breathing room your Honda deserves.

This is a direct bolt-on replacement that fits your factory airbox perfectly. No carburetor re-jetting, no custom fabrication, no guesswork. Hiflofiltro's Powerflow media filters out contaminants while allowing significantly more air through than OEM, which translates to better combustion efficiency and noticeable mid-range punch.

• Direct OEM replacement
• Hiflofiltro Powerflow media
• Bolt-on installation
• Optimized airflow design
• High-quality construction
• No jetting required
• Fits 1990–2002 ST1100
• Superior filtration efficiency
• Enhanced engine responsiveness
• Tested for reliability