>>309647314
It needs to be modded in. I haven't tried it, but it looks like this would work.
https://www.racedepartment.com/downloads/rx7-rev-beeper.20784/
>>309661859
You can try this one.
https://mega.nz/folder/BBwxhS6D#4jJIfs6omnJUaJfsnqPqGQ