Founded in 2001 by James Sofronas and Fabryce Kutyba, GMG has quickly established itself as North America's premier performance tuning facility. The staff, attention to detail, and passion are what make GMG and RAC Performance the choice of professionals and enthusiasts world wide. GMG's home office is located directly across the street from Porsche Motorsport North America (PMNA). This close proximity offers GMG a clear advantage when upgrading performance and developing racing products for these outstanding automobiles. With the newly formed partnership of GMG and RAC Performance, we will now be able to bring the precision crafted products and extensive race track derived knowledge to customers.