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Exhaust Back Pressure Tester Test for clogged or obstructed catalytic converters and mufflers. Fast and easy to use. Threads into Oxygen Sensor Port. Kit includes 12 mm. and 18mm adapters to fit most domestic and imported vehicles. Gage measures 21/2 in. diameter and has dual scale: 15 PSI and 1.00 Kg/Cm2. Hose is 41in. long. No need to tap into exhaust system then reseal holes afterwards. Packed in a vinyl pouch for store display and tool box storage.
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