BELEY Exhaust Back Pressure Tester Kit — 2.5-inch Gauge, 57-inch Heat-Resistant Hose, Color-Coded PSI Zones

BELEY Exhaust Back Pressure Tester Kit is a professional-grade gauge and hose set for measuring exhaust system back pressure to pinpoint clogged catalytic converters or restricted mufflers.

When exhaust flow is restricted, engines can lose power, run hot, or respond poorly to throttle inputs. This kit gives technicians and experienced DIYers a fast, reliable way to measure pressure in the exhaust stream, interpret results with color-coded zones, and decide whether a converter, muffler, or piping needs service. It’s built for durability and makes on-vehicle testing simple from the driver’s seat.

How does the BELEY tester reveal a clogged catalytic converter?

The tester records back pressure across idle and higher RPM ranges so you can see if pressure exceeds normal limits. Excessive readings in the red band suggest a restriction downstream of the test point, commonly a clogged converter or collapsed muffler packing.

• 2.5-inch analog gauge with PSI/Bar scale and three color bands for instant interpretation.
• Factory-calibrated pointer; reset to zero if bumped during shipment without losing accuracy.
• Measures idle and 2500 RPM conditions to compare against recommended thresholds.

What makes this kit reliable for workshop and roadside diagnostics?

Materials and design focus on repeatable readings and operator safety. The long, heat-resistant hose and robust adapters let you place the gauge away from hot components, and the rubber protective cover reduces risk of damage if the tool is set down or handled roughly.

• 57-inch silicone hose rated for high temperature and abrasion resistance for safe distance testing.
• Drop-resistant rubber gauge cover that aids in longevity and grip.
• M12 and M18 thread adapters for broad exhaust port compatibility across many vehicles.

How do I interpret gauge readings and color zones?

The face shows three colored bands to help you quickly decide if pressure is within acceptable bounds. Readings in green indicate normal flow, amber suggests partial restriction or borderline condition, and red points to a significant blockage that needs attention.

• Idle benchmark: readings equal to or below approximately 1.25 PSI (0.09 Bar) are typical.
• Higher-RPM check: pressure up to about 3 PSI (0.21 Bar) at 2500 RPM is expected for many systems.
• Red-band results imply cleaning, repair, or replacement of the exhaust component.

Can this kit be used on different vehicle types and where do I connect it?

The kit is made to work with most gasoline and light-duty diesel exhaust systems that provide a test port or an accessible bung on the exhaust stream. Use the appropriate thread adapter to fit the sensor bung or remove an oxygen sensor (where safe and applicable) to insert the test probe and measure directly.

• Includes M12 and M18 adapters to match common exhaust ports and sensor threads.
• Long hose allows the gauge to sit on the passenger seat or workbench during testing.
• Non-electronic analog gauge avoids interference with vehicle systems and is simple to read.

Who this is for: mechanics, service shops, vehicle inspectors, and experienced home mechanics who need a fast, portable way to evaluate exhaust flow restrictions. If you troubleshoot engine performance issues, overheating, or poor acceleration that may stem from exhaust back pressure, this BELEY kit gives clear, actionable readings so you can decide on cleaning, repair, or component replacement.