Apa Itu Stearic Acid
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. The FA20E and FA20F engines have a cast aluminium alloy cylinder head with chain-driven double overhead camshafts per cylinder bank.
![](https://i.pinimg.com/originals/d8/71/56/d8715615f039e4c4407096db178aa396.jpg)
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