I would recommend the following if you are serious about all of this, this goes for anyone wanting "sponsorship":
1. Get better pics of your car to use. High res, multiple angles, nice clear day or in a controlled environment, and without a image of a guys tattooed arm taking up half the pic
2. Put together a detailed list of what your build plan is, what events and promotional venues you will doing, etc. Dates, specifics, real goal for the car, etc.
3. You need to present this all in one email, any attachments for the vehicle/schedule, then sight in specific manufacturers and speed shops to start filling in your needs and contact them directly.
4. Even with a well organized approach, some informational background on yourself should be included with the package you are sending out, and hopefully you have a background in sales/marketing/ or at least networking skills and associations within our industry. You are an extension of the brands sponsoring you, so who are you and why should the sponsor entrust you to promote their brand.
I hope that helps. Like I said, if you are serious than that is where to at least start. A thread like this is going to get you nowhere in reality. And if the goal is really just to get some free parts, well your probably not going to get far with a simple thread like this, no details, and one blurry image of your car. Companies like us get "sponsorship" requests weekly if not daily from guys who hit a few car shows and want their car to be sponsored with free parts, the relationship is a partnership, one in which we need to know exactly what you are bringing to the table. Most importantly, remember that you and your car is an extension of your sponsors, so organized companies that have spent a lot of time and money building their brand and name, want to work with professionals that understand that and work with them in a professional manner. What you put into this is what you will get out of it.
I wish you and your Camaro the best!