prior art for other non-metallic conductive materials and their ability to reduce RF interference related problems. These cables consisted of a graphite/resin composite conductor strands and a protective silicone sheath. The strands were to be twisted together and drawn through the liquid matrix material, finally being surrounded by the sheath. The two parts would be extruded together to form the cable and ensure a well bound structure of thousands of individual graphite composite filaments. The majority of patents are for Polyamide-imide engine components, with the potential for graphite, glass or titanium reinforcement as a composite. The inventions are claimed to have a superior stiffness-to-weight ratio, be up to 70% lighter than traditional parts and reduce vibration and forces within the engine. The composite parts are also claimed to reduce production requirements due to being injection moulded with consequently reduced finishing work. Although the temperature, time and other process variables differ between parts, the general manufacturing process follows. The component is first injection moulded and allowed to cool past its plastic deformation temperature. It is then post cured by solid state polymerisation at a series of temperature steps. This is performed in an inert atmosphere which helps to expel by-products of reactions until the polymer is chemically stable. During this process the heat deflection temperature of the material also increases. The part is now cooled and post-processed. Post processing can take the form of machining, insertion or adhesion of metal parts or a simple cleaning of the part. Composite Castings LLC In 1990 Matti Holtzberg founded Composite Castings LLC, based in West Palm Beach, Florida. By 2011 they had developed a V4 carbon reinforced epoxy composite engine block with materials supplied by Toho Tenax. The block is claimed by Holtzberg to be up to 50% lighter than an equivalent aluminium model. The blocks are produced to net shape so minimal finishing work is required to make them ready for use. Holtzberg claims that this reduces tooling and production costs by 50% in comparison to die casting. Fraunhofer and Sumitomo research In April 2015 the Fraunhofer group in collaboration with the high performance polymer division of Sumitomo Bakelite Co announced their development of a single cylinder research engine with a casing made of injection moulded glass fibre reinforced phenolic resin (55/45 respective composition). The engine weighs about 20% less than an equivalent of aluminium. Their design uses metal inserts in places of