Lang Three Way Exhaust Back Pressure Kit

Allows quicker and more accurate testing of exhaust blockages in catalytic converters, mufflers, etc. Can test in three different places: Oxygen Sensor, Exhaust Pipes, Air Injection System. Special gauge has two multi-colored bands - idle and 2500 RPM, with pressures shown in PSI and bar. Hose is 6 feet, enough length for the technician to test from the drivers seat. Comes in Plastic Carrying case.