Car-X Auto Service. Car-X Auto Service was founded in 1971 by a group of enterprising and experienced muffler shop owners. During the early years, Car-X was primarily an exhaust specialist. But today, due to our 24/7 non-stop, fast paced world, we’ve adapted to providing just about any automotive repair you can imagine. We continue to evaluate our position and business and add products and services that are comparable to today’s auto repair climate.