László Mészáros1, Tamás Deák1, Márk István Gali1 1 Department of Polymer Engineering, Budapest University of Technology and Economics, 1111 Budapest, Műegyetem rkp. 3. The primary aim of our research was to demonstrate the applicability of polymers reinforced with nanoparticles and conventional fibres, which are nowadays relatively easy to produce, as a raw material for commercially available products. For this purpose, an injection moulded valve cover was chosen.