My bf was sponsored with his 99 Cougar by several aftermarket companies.
In order to get sponsored you basically need to do a few things.
1. Spend alot of $$ on the car to get it to the point where you can actually WIN shows.
2. Win several awards at MAJOR events -- not the local car clubs show. Travel out of state to big events. Companies like to see cars that will be seen by a broad audience.
3. Make a proposal - company specific. Include personal info, car info, goals, etc. Tell them what you expect from them and what you want them to help you with.
4. Contact the company and speak to whoever is in charge of sponsorships (Marketing). Ask if they are sponsoring and how to submit the info. They will most likely want pics to back it up.
5. Dont expect to get things for free. 75% of the time you will only get a discount -- sometimes that discount is BIG -- but you will have to spend more money.
He was sponsored by Aerogear, Corbeau, Vitek, OMP and a few smaller companies.
Pe@ce