Main Usage:Test the pressure in the front of catalytic converter to determine whether the exhaust is blocked; Connection:Remove the oxygen sensor on the front of catalytic converter, install the hose and gauge in the position of the oxygen sensor; Compatibility:Package include 2 types of joints(M12 and M18), fit with 2 types common oxygen sensor thread; Specification:Pressure gauge readings in psi and bar. Positive pressure range 0-14psi. Negative pressure range 0-25inHg. It can also be used for additional purposes, such as intake manifold vacuum test, cylinder and fuel pump pressure test.It must match the right joint(package not include); Quantity:1 x pressure gauge, 1 x high-pressure hose, 2 x connection joint, 2 x clamps, 1 x users manual
