Founded in 2001 by James Sofronas and Fabryce Kutyba, GMG has quickly established itself as North America’s premier performance tuning and racing facility. What began as a small 1200 sq. ft. shop, maintaining two race cars, has grown into a 30,000 sq. ft. state-of-the-art performance tuning, racing and service facility located in (Orange County) Santa Ana, California. The staff’s experience, attention to detail, and passion are what make GMG the choice of professionals and enthusiasts world wide. Whether you want to maximize the performance of your street car, or race wheel-to-wheel on both amateur and professional racing series across North America, GMG’s reputation for service and quality is unmatched.