跑車尾的定風翼的英文寫法

Stablizer = 隱定裝置 (採用了希望得到最後的效果來形容)
Spoiler = 擾流器 (採用了作用過程的方式來形容)
both of them are OK but emphasize on different stages of effect and at the same time, they are general terms only.

定風翼的英文 = Spoiler

定風翼的英文 = Stablizer