What are those symbols above the racing cars?


In the manga, there are symbols above the cars when they race. In the picture
below, it says ガッアアアア in katakana. What does it mean? Is it the sound of
drifting or an engine?

![Initial D chapter 200](https://i.stack.imgur.com/C8mLLl.jpg)




ガアアアア ("gaaaaa") implies more of an engine sound than the screeching tires I
would associate with drifting.

