Given that drag racing and autocross involve very different vehicle set ups and questions it may be more user friendly to have separate boards for them. Open track racing too maybe but it's probably similar enough to autocross to not warrant it. Maybe the name could reflect both.

 

Looking at it, I'm not quite sure if there is an overall enough usage of that section to justify splitting it and adding another new section. We generally only add sections when there's a need and usage to support it. Some sections (such as Transmissions and Drivetrain) aren't quite the same either, but they're grouped together.