When I host a server I have the chance to allow only a selection of mods. That's great for hosting races with diverse mod lists with cars about equal power. The problem is how overpopulated the mod list is and I have to manually list and select all allowed cars one-by-one.

My suggestion is to add filters. You could filter
-horsepower (min-max)
-weight (min-max)
-hp/weight ratio (min-max)
-gearbox (type)
-drive (fwd, rwd, 4wd)

This way you could easily create a diverse selection without the at least half hour long manual search.