OTC 7215 Exhaust Back Pressure Gauge.
This exhaust back pressure gauge is a fast and easy way to read exhaust back pressure and help determine the extent of restriction.
To use, simply insert the tool into the oxygen sensor hole. Large, easy-to-read gauge clearly shows pressure from 0-8 PSI.
A special design tip provides more accurate pressure readings. Its stainless-steel braided tubing withstands high-heat engine conditions. A universal adapter is also included for vehicles with thermactor systems. For use on GM, Ford, Chrysler and imported vehicles.
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