This high-quality FKM (fluorocarbon rubber) sealing ring set allows you to replace the original O-rings on both sides of the injectors of your Mercedes M111, M104, M112, M113, M119 engine, and many others with a 14mm channel dimension. After many years of operation, the original sealing rings become hard and brittle, which can lead to false air entering the intake manifold or, in the worst case, a leak on the fuel side.
