This is more about the forums that the game, but I do not know who else to ask. Many players on the forums (including me) are starting “car companies”, and creating models for them. This is a great idea, and encourages many people to play the game. Would it be okay if I started a “tuning company”? For example, a player creates a car model, and adds it to their “company”. They then give the platform and/or model to a “tuning company” who modifies the body and tunes the engine, or installs a new one. They might give the tuner a sheet of specifications for the tuned car to meet. The original creator of the car would then add it to their lineup as the “(Model Name) tuned by (Tuner Name)” or adds the tuning company in the description. Does this make sense? If so, can I start a tuning company?
I personally think this really wouldnt be a problem. Who are the devs to stop your creativity? I think they actually encourage you to express that creativity! 
I just want to make sure that it is okay. Thanks for the encouragement.
This is a cool idea and it’s be great if it was supported in the tycoon release of the game somehow.
There has to be people out there that’d like to be AMG, Ralliart or one of the other similar companies.
Probably eventually when you can play together online with the tycoon part, You could sell your designs to someone you are cooping with, and sell your designs for 1 dollar each, or somesort of reduced percentage, and have them make sporty/upgraded versions of your cars. That shouldnt be hard to do really. But Dont expect complete aftermarket sets to come from the devs. Maybe some modding people will make soms mods related to this, but the devs wont (has been discussed various times)
I love the idea if a tuning company and that is what I am hoping to do with my company. Possible even create a factory race team for a manufacturer.
Race team wont be possible in the original release of Automation. Maybe later either through the developers or through mods.
You can make a tuning company like AMG for Mercedes, AC Schnitzer for BMW and some others. You just take the original models and make them sportier and with more HP 
But only, when they allow you to take those models. Im not sure how the AI will respond to this and the target audience see it as a copy or really see it as an exotic car with a lot of HP for the rich.