Exhaust Back Pressure Kit 3 Way

• This THREE way tester allows quicker and more accurate testing of exhaust blockages in catalytic converters, mufflers, etc.
• Can test in THREE DIFFERENT PLACES - Oxygen Sensor, Exhaust Pipes, and Air Injection System. The only tool like it on the Market today!

1. Oxygen Sensor adapter includes M12 & M18 thread. Flange and gasket also included for cars with flange-type oxygen sensors.

2. Exhaust Pipes testing, includes threaded inserts, an installing tool, sealing screws & washers are included. Testing can be done on either side of catalytic converter and muffler to pinpoint blockage.

3. Air Injection System testing, includes four rubber adapters and quick coupler plugs to use at the air injection pipe inlet fitting.