Compatible with all petrol engines. Suitable for fault finding, including air leaks, incorrect valve timing, low turbo boost pressure, engine misfires, low engine compression, advanced/retarded ignition, air/fuel ratio, balancing carburettors and fuel economy. The dual reading pressure gauge 0 - 10psi/0 - 0.7bar is fitted with a heavy duty rubber protector. Supplied in a plastic storage case.