Universal O2 Sensor Spacer M18x1.5 – Zinc-Coated, Bolt-On Fit for Exhaust SystemsFeature: 1: The O2 CEL fixture actually incorporates the M18X1. 5 miniature Converter Connector,which helps to get rid of the modified exhaust or the inspection engine light after removing the catalytic converter. 2: Made of Zinc Plated Steel which is durable and have high strength to use. 3: AVOID A CHECK ENGINE LIGHT,Converter Connector built inside and will help get rid of that annoying check engine light. 4: If the O2 sensor is too sensitive, the