Forgot to update, RA-R dropped off early may at 3pm in the afternoon, both the airbag and in inlet pipe were done by 12 pm the next day, no rattles. I was pretty happy tbh, they still had no idea what the car was though
Yeah, high pressure zones are a thing.
The plastic under trays are functional, they create a low pressure zone around the gearbox helping draw air through the engine bay. Worth looking at a nice alloy undertray to help out there ;-)