it is possible that different teams (same car) in the same mod have different upgrades? or when you choose an upgrade it is for everyone? thanks
You can use different Upgrade files and link to them in the veh files. And if you want to use defined upgrades on a special track, you can use the "fixed Upgrades" feature in the upgrades screen. But you have to test, if it works in Single player with or/and without using a virtual mod.