Catalytic Converter Exhaust Back Pressure Tester Gauge – Diagnostic Tool For Clogged Cats

Think your catalytic converter might be clogged?

This simple gauge lets you test exhaust back pressure and find out for sure.

Just hook it up to an oxygen sensor port or a test point, and you'll see the pressure reading.

If it's too high, your cat is probably plugged.

Works with most vehicles, and even supports ABS systems for some applications.

It's unbranded, but it's a basic tool that does one job well.

No OBD interface, just old-school mechanical diagnosis.

If you're a DIY mechanic, this tester saves you from guessing and replacing parts you don't need.