Designed for the assembly and disassembly of valve springs or when replacing the valve stem. This kit is designed to work without removing the cylinder head. Valves will be closed using pressurised air preventing falling into the combustion chamber. Perfect for working in confined areas. Applications: Mercedes-Benz: M102, M103, M104, M111, M112, M113, M271, M272. BMW: N42, N52, N62, M54, M52, M56, E38, M60, V8. Can also be used on many other European, American and Japanese vehicles.