Quickly test back pressure and clogged or obstructed catalytic converters. Three stage Oxygen Sensor Port Adapter has 12MM and 18MM thread sizes to fit most domestic and import vehicles. The standard 1/4-20 tip provides the ability to test through the exhaust pipe. High temperature silicon hose prevents damage to tester from high exhaust temperatures. Product Features:Easy to install 3 stage adapter, plus Adapter flangeRemovable 6 high temp silicone tube, and 0-15 PSI gauge with 2-1/2 faceAccess most common O2 sensor ports or self tap accessAccess common Toyota style O2 sensor portsAccurate, easy to read pressure within a 1/2 PSI
