S&S Cycle VFI Closed Loop Sensor Kit for 1995.5-2001 Harley-Davidson Big Twin

S&S Cycle VFI Closed Loop Sensor Kit for 1995.5-2001 Harley-Davidson Big Twin

Closing the loop on S&S Magneti Marelli fuel injection allows the system to self-correct based on exhaust gas readings, delivering a cleaner idle, more consistent throttle response, and better fuel efficiency under varying load. This sensor kit provides everything needed to add closed-loop capability to an existing S&S VFI installation, completing the system as it was designed to operate.

Key Features

• Adds oxygen sensor closed-loop feedback to S&S Magneti Marelli VFI-equipped Big Twins
• Compatible with 1995.5-2001 fuel-injected Big Twins using S&S Magneti Marelli VFI module 559-0001
• Closed-loop operation allows the VFI module to self-correct air/fuel ratio based on live exhaust gas readings
• Includes sensor, wiring, and mounting hardware for a complete installation
• Developed by S&S Cycle specifically for the Magneti Marelli VFI platform

Technical Specifications

• System Compatibility: S&S Magneti Marelli VFI module 559-0001 only
• Function: Closed-loop O2 sensor integration
• Includes: O2 sensor, wiring harness, and mounting hardware
• Application: 1995.5-2001 fuel-injected Harley-Davidson Big Twin

Fitment Notes

• For use only with S&S Magneti Marelli VFI module (part number 559-0001)
• Compatible with 1995.5-2001 fuel-injected Harley-Davidson Big Twin engines using the S&S VFI system
• Not compatible with stock Harley-Davidson ECM, Delphi, or other aftermarket fuel management systems
• Review the Fitment tab for complete year and model breakdown