O2 Sensor Extentions & Bung Reducers

NAMZ CUSTOM CYCLE O2 Sensor Extensions & Bung Reducers

Fit older headers to newer Harley-Davidson models — NAMZ Oxygen Sensor Extensions & Bung Reducers are engineered to let you install 2009-style headers and exhaust systems on 2010 and later FL models, as well as all 2012 FXST and Dyna models. Designed and tested by NAMZ engineers for reliable fitment and plug-and-play convenience.

Key Features

• Plug-n-Play Front Harness Extension — provides the extra length required when factory sensors are located further back on 2010+ head pipes.
• 18mm to 12mm Bung Adapters — included reducers allow seamless use of older style pipes on newer model heads.
• Pre-installed Terminals — terminals are installed without connectors for a clean, professional installation.
• Engineered Fit — tested by NAMZ to ensure correct routing, fitment, and reliable sensor operation.

Benefits

• Retain your preferred 2009 exhaust style on newer bikes
• Simplifies install with a ready-to-use harness extension
• Eliminates the need for costly custom wiring or sensor relocation

Compatibility: 2009 headers/exhaust systems with 2010-up FL models; all 2012 FXST & Dyna models.

Upgrade with confidence — NAMZ O2 Sensor Extensions & Bung Reducers deliver an easy, reliable solution for matching legacy exhausts to modern Harley-Davidson sensor locations.