2 Pack O2 Extender extension adapter oxygen sensor spacer cel fix m18x1.5x45mmSpecifications These are needed when using a HHO System or a test pipe. They are also used to lean out your vehicle for better gas mileage. Material: Steel. Dimension: Size: M18 x 1. 5MM thread Length: 45mm Fitment: The extender has a 7 8 hex head which is the same size as most O2 sensors and it makes them easer to install not like the straight sided extenders. Fits all standard size sensors with a 1 2 Inch diameter tip. The size of the extenders is
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