Subaru FA20D Engine - australiancarews The FA20D engine had an aluminium alloy cylinder head with chain-driven double overhead camshafts. The four valves per cylinder – two intake and two exhaust – were actuated by roller rocker arms which had built-in needle bearings that reduced the friction that occurred between the camshafts and the roller rocker arms (which actuated the valves). Fox Files | Fox News Jan 31, 2022FOX FILES combines in-depth news reporting from a variety of Fox News on-air talent. The program will feature the breadth, power and journalism of rotating Fox News anchors, reporters and producers.