Innovate Motorsports 37290 HBX-1 Heat-Sink Bung Extender for Wideband O2 Sensors

The Innovate Motorsports HBX-1 Heat-Sink Bung Extender is a precision-machined stainless steel component designed to protect wideband oxygen sensors from excessive exhaust temperatures in high-heat applications. This specialized adapter pulls the O2 sensor 1.1875 inches (30mm) away from the original weld boss, significantly reducing applied temperature while maintaining proper exhaust gas flow to the sensing element for accurate air/fuel ratio readings.

Key Features:

• Cast stainless steel construction with specialized heat-sink design
• Extends sensor 1.1875 inches (30mm) from exhaust pipe for thermal protection
• Compatible with Bosch LSU4.2 and LSU4.9 wideband O2 sensors
• Ideal for turbo vehicles, rotary engines, and high-temperature applications
• Prevents sensor timing errors caused by excessive heat exposure
• Maintains venturi-effect exhaust flow for accurate readings
• Universal fitment with standard M18 x 1.5 oxygen sensor bungs

The HBX-1 addresses a common problem in performance applications where exhaust gas temperatures exceed 1,700°F or sensor housing temperatures exceed 1,058°F. In these extreme conditions, standard oxygen sensors can provide inaccurate readings or display error codes. This heat-sink bung extender provides thermal isolation to keep sensors within their optimal operating range, extending sensor life and ensuring reliable air/fuel monitoring in demanding environments.