Exhaust Back Pressure Gauge Now you can quickly read back pressure to determine the amount of restriction in an exhaust system. This gauge accurately measures through the oxygen sensor hole. Its large dial clearly shows pressure from 0�8 psi. The system has a stainless steel braided tube to withstand high-heat conditions.

• Includes a universal adapter for vehicles with thermactor systems.
• Works on domestic and imported vehicles. No. 7215 � Exhaust back pressure gauge with universal adapter.