M 18 X 1.5 mm Reducer M 12 X 1.25 o 2 Oxy Sensor Bush Steel Zinc

Aeroflow performance oxygen sensor reducer bush is designed to step down an oxygen sensor. It features an m18 x 1. 5mm on the outside and a m12 x 1. 25mm on the inside. This allows a user to run a new style smaller oxygen sensor which features a m12 x 1. 25mm thread pitch to the more common m18 oxygen sensor.