✔ 最佳答案
that is not just black in colour, but un-painted Carbon fiber Bonnet.
"碳纖頭冚英文應為Carbon fiber Bonnet (英式英語)或 Carbon fiber Hood(美式英語).
高價嘅超級跑車原廠會用碳纖頭冚, 為咗降低車重, 增強駕駛表現
至於坊間所買到嘅替換碳纖頭冚, 通常都係為咗玩外形同埋所謂嘅"潮"多. 嗰D carbon fiber bonnet質素參差, 而且車頭冚嘅扣如果做得唔好, 隨時揸揸吓車個頭冚彈起, 係非常之危險嘅."
people tend not painting the Carbon fiber Bonnet usually to show off they have this option.
a referencing photo ( sorry that i can't find the one for AE86)
http://www.cazbuyer.com/cars-images/eg9.jpg