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). not based on your username or email address. Learn more here. Password confirm. Birthday: Required by law. Only month and day are displayed by default. I am: By creating an account on LiveJournal, you agree to our User Agreement. Create account . Or you can use social network account to register. Welcome . Create First Post . Applications iOS ...