Production Car Type Only grouping option in Freeplay

It would be nice to add a “Productions Only” option on the groups.
The main reason I play on Freeplay is because of the ability to customize races.
I stay away from Prototypes, Formulas, Silhoutttes, and factory one offs.
Whenever I have Forza GT, I always have to change the Non-Production cars to another group.

Production cars are models driven on public roads or taken off the assembly line. GTE, GT3, and TCR are taken as Body On White, so they are techically Production.

Eventhou the challenge cars (Super Trofeos, Porche Cups, Ferrari Challenge) are GT racecars, they are not Production, as they are built from custome chassis.

It gets difficult to classify if vintage racers were street legal as laws were different back then, and different countries have different laws.

With the new Forza GT divisions in the future, its ganna be a pain to have multiple GT groups without having room for street cars. Having a Productions Only would also make it easier to filter out cars, to the point of having one group.