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 when O2 sensor ports are inaccessible.* High temperature silicon hose prevents damage to tester from high exhaust temperatures.
* Pipe tap set not included.
- Easy to install 3 stage adapter, plus Adapter flange
- Removable 6" high temp silicone tube, and 0-15 PSI gauge with 2-1/2 face
- Access most common O2 sensor ports or self tap access
- Access common Toyota style O2 sensor ports
- Accurate, easy to read pressure within a 1/2 PSI
Hickok BPT02 Back Pressure Tester 
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