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The Sealey VSE953 is a catalytic converter back pressure test kit designed to diagnose the working condition of catalytic converters and exhaust silencers. This versatile diagnostic tool connects directly into the exhaust system via the supplied oxygen sensor dummy adaptors, enabling accurate measurement of back pressure to identify blockages or restrictions in the exhaust system. The gauge features a colour-coded scale for easy diagnosis, reading both pressure (0-10psi) and vacuum (0-60cmHg), making it suitable for testing beyond exhaust systems. This dual functionality allows technicians to diagnose low pressure fuel systems and engine vacuum, providing additional diagnostic capabilities across multiple vehicle systems within a single tool. The kit includes comprehensive connection options with M12 x 1.25mm and M18 x 1.5mm oxygen sensor adaptors to suit various vehicle applications, plus small and large brass cone adaptors for alternative connection points. A gauge hanging chain is supplied for hands-free operation, enabling technicians to perform dynamic testing whilst the engine is running. Features and Benefits: • Colour-coded gauge scale enables quick and easy fault diagnosis • Dual pressure and vacuum measurement for versatile diagnostic applications • Multiple adaptor sizes for compatibility with most vehicle exhaust systems • Hands-free operation with supplied hanging chain for dynamic testing Specifications: Brand: Sealey 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 Nett Weight: 0.88kg Pressure: 0-10psi Vacuum: 0-60cmHg