I have a S5 T2 completely stock.
I have to change all vacuum hoses and I would like to know if there was a site or link that can show you how to replace the vacuum hoses correctly.
thanks for the help.

 

The factory service manual (FSM) has them (in black and white)

The website has them in color thanks to a few users who took the time to fill in the color for every single hose:

https://www.rx7club.com/search.php

I know for a fact I have pulled them up on here more than a few times... If you honestly can't find them after looking, I will gladly re-post them here after a search, just let me know.

Non of these will show you how to replace them, that is pretty straight forward. They will show you where each one goes though...