EOS Exhaust Straight O2 Oxygen Sensor Spacer Adapter M18x1.5
Straight O2 Sensor Spacer M18x1.5 Dimensions - 45mm Length, 22mm OD, 6mm Orifice
EOS Exhaust Straight O2 Oxygen Sensor Spacer Adapter M18x1.5
Straight O2 Sensor Spacer M18x1.5 Dimensions - 45mm Length, 22mm OD, 6mm Orifice
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EXT-OS129

EOS Exhaust Straight O2 Oxygen Sensor Spacer Adapter

$24.95
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Product Overview

Universal Fit – For Vehicles with Standard M18 x 1.5 Oxygen (O2) Sensor Bungs.

Optimize downstream exhaust oxygen sensor positioning and maintain reliable ECM monitoring following aftermarket exhaust upgrades with this Straight M18x1.5 Oxygen (O2) Sensor Spacer Adapter. Precision-engineered for universal exhaust bungs, this extender repositions the secondary downstream O2 sensor slightly out of the direct high-velocity exhaust flow, helping stabilize sensor readings on vehicles fitted with aftermarket downpipes, test pipes, or high-flow catalytic converters.

Standardized M18x1.5 Threading & Precision Dimensions: Features universal M18 x 1.5 male external threads and female internal threads to fit standard automotive oxygen sensors. Designed with an overall length of 45mm, a 22mm outer hex base for easy wrench tightening, a 16.5mm inner diameter recess, and an integrated 6mm inlet orifice to restrict direct exhaust gas contact without impeding sensor functionality.

ECM Air-Fuel & Sensor Readout Stabilization: The engine control module (ECM) relies on O2 sensor signals to monitor residual oxygen levels and regulate stoichiometric air-fuel ratios (14.7:1). When installing high-flow downpipes or race headers, altered exhaust flow can trigger false sensor readings or check engine lights. This spacer backs the sensor out of the turbulent main stream, allowing the sensor to sample ambient exhaust gases cleanly.

Durable CNC-Machined Heavy-Duty Build: Precision CNC-machined from high-strength steel with a polished silver protective finish to resist extreme exhaust heat, thermal shock, corrosion, and thread seizing. Installs in minutes using standard hand tools directly into existing exhaust bungs.

Specifications:
Type: Oxygen (O2) Sensor Spacer / Extender Adapter
Style: Straight
Thread: M18 x 1.5 (Male / Female)
Overall Length: 45mm
Hex Outer Diameter: 22mm
Inner Diameter: 16.5mm
Restrictor Orifice: 6mm
Material: High-Strength Steel
Surface Finish: Polished Silver
Fitment Type: Universal Fit

Package Includes:
1 x Universal M18x1.5 Straight Oxygen (O2) Sensor Spacer Extender Adapter

Key Features
  • Universal M18x1.5 Threading: Compatible with standard M18 x 1.5 pitch oxygen sensors across domestic, import, and European vehicles.
  • Straight Adapter Architecture: Features a 45mm overall length extension design to push downstream sensors out of direct exhaust turbulence.
  • Integrated 6mm Restricted Orifice: Built-in 6mm inlet hole limits raw exhaust gas exposure to stabilize sensor signal voltage.
  • 22mm Hex Base Outer Diameter: Formed with a 22mm outer hex body (16.5mm ID) for effortless socket or wrench installation.
  • CNC-Machined High-Strength Construction: Crafted from high-density solid steel to withstand high-temperature exhaust environments.
  • Polished Corrosion-Resistant Finish: Sealed with a protective polished coating to prevent rust, thread seizing, and heat degradation.
  • Ideal for Aftermarket Exhaust Upgrades: Perfect companion for aftermarket downpipe, test pipe, race header, or high-flow cat installs.
  • ECM Signal Consistency: Helps regulate downstream sensor exposure to assist ECM air-fuel ratio monitoring and diagnostic stability.
  • Direct Screw-In Installation: Male outer threads thread straight into exhaust bungs while female inner threads hold the OEM sensor.
  • Compact Single-Piece Design: Sturdy 1-piece solid construction eliminates leaks and ensures vibration-resistant threading.
Installation

Professional Installation is HIGHLY Recommended.

Note: Modifying emissions-related components may not be legal for street use in some states/areas. Please check your local laws and regulations before installation.

Vehicle fitment

This part is universal — it is not tied to a specific year, make or model. Please check the product details and measurements before ordering.

Fitment is verified against the manufacturer application data for this part. If your vehicle is not listed, or you are unsure, email support@extremeonlinestore.com before ordering.

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