Sealey Catalytic Converter Back Pressure Test Kit

- Contents: Oxygen Sensor Adaptors; M12 x 1.25, M18 x 1.5mm, Small and Large Brass Cone Adaptors, Plastic Double End Cone, Plastic 'T' Piece, Gauge Hanging Chain. - Used to establish the working condition of the catalytic converter and silencer by measuring the relative back pressure of the system. - Simply connect into the exhaust system using either of the two oxygen sensor dummy adaptors supplied in the kit. - Gauge features a colour-coded scale for easy diagnosis and reads both pressure (0-10psi) and vacuum (0-60cmHg) so can be used on other areas of the vehicle allowing testing of low pressure fuel systems or engine vacuum. - Supplied with gauge hanging chain to allow hands-free operation.