OTC Exhaust Back Pressure Gauge

OTC 7215 Exhaust Back Pressure GaugeNow there's a fast, easy way to read exhaust back pressure to help determine the extent of restriction.Simply insert the 7215 into the oxygen sensor hole.Large, easy-to-read gauge clearly shows pressure from 0-8 PSI.Specially designed tip provides more accurate pressure reading while stainless steel braided tube 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.