Cylinder head gasket- metal. 138mm inside Cylinder head gasket is New, Aftermarket part part with reference p/n: 9277662, for diesel engine Liebherr D906. We recommend gasket sets for a given model. Liebherr D906 engines were already installed in Liebherr construction machinery in the 1980s. The company currently employs over 32,000 employees on all continents of the world.