This is on a fully upgraded Integra:
The engine sound is very quiet in general but suddenly gets loud momentarily after every successive gear shift. Also, on downshifts, the engine sound again becomes loud with the driver revving really high for some reason (auto blip, normal manual) - and then goes back to being quiet.
I do not have the time to record videos for you, sorry. You can test it out on your end and investigate as I’m sure the team has access to an Xbox console.
Thank you.