GMG specializes in the performance tuning of Audi automobiles. GMG is an authorized dealer and technological partner with many of the industry leading companies. We also engineer, develop and manufacture our own line of performance products and wheels under the GMG World Challenge and LMS lines. With the technology, experience, and knowledge transferred from our professional race program, these upgrades will further refine will further refine your road going vehicle.
GMG is a leading installer and tuner of standalone engine management systems from Motec, Link, and AIM. As a development partner with GIAC, we can go beyond the ECU reflashing offered by most shops and, instead, perform a custom calibrated software tune for your specific vehicle with your specific hardware.
GMG offers a concierge service based around a driver’s particular needs for each tuning project. Our staff is trained and well-versed in the needs of a particular driver and his or her intended use of the vehicle. Unlike most shops that sell parts out of a catalogue, GMG brand specialists have firsthand experience with the products, services and results involved around each vehicle modification. No two individuals are alike so no two vehicles are tuned the same way at GMG.
GMG specializes in the performance tuning of Ferrari automobiles. GMG is an authorized dealer and technological partner with many of the industry leading companies. We also engineer, develop and manufacture our own line of performance products and wheels under the GMG World Challenge and LMS lines. With the technology, experience, and knowledge transferred from our professional race program, these upgrades will further refine will further refine your road going vehicle.
GMG is North America’s leading Ferrari tuner and an Authorized Tuning partner and conversion center to Novitec Rosso for over 13 years.
GMG is a leading installer and tuner of standalone engine management systems from Motec, Link, and AIM. As a development partner with GIAC, we can go beyond the ECU reflashing offered by most shops and, instead, perform a custom calibrated software tune for your specific vehicle with your specific hardware.
GMG offers a concierge service based around a driver’s particular needs for each tuning project. Our staff is trained and well-versed in the needs of a particular driver and his or her intended use of the vehicle. Unlike most shops that sell parts out of a catalogue, GMG brand specialists have firsthand experience with the products, services and results involved around each vehicle modification. No two individuals are alike so no two vehicles are tuned the same way at GMG.
GMG specializes in the performance tuning of Mercedes automobiles. GMG is an authorized dealer and technological partner with many of the industry leading companies. We also engineer, develop and manufacture our own line of performance components and wheels under the GMG World Challenge and LMS lines. With the technology, experience, and knowledge transferred from our professional race program, these upgrades will further refine will further refine your road going vehicle.
GMG is a leading installer and tuner of standalone engine management systems from Motec, Link, and AIM. As a development partner with GIAC, we can go beyond the ECU reflashing offered by most shops and, instead, perform a custom calibrated software tune for your specific vehicle with your specific hardware.
GMG offers a concierge service based around a driver’s particular needs for each tuning project. Our staff is trained and well-versed in the needs of a particular driver and his or her intended use of the vehicle. Unlike most shops that sell parts out of a catalogue, GMG brand specialists have firsthand experience with the products, services and results involved around each vehicle modification. No two individuals are alike so no two vehicles are tuned the same way at GMG.
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GMG specializes in the performance tuning of Porsche automobiles. GMG is an authorized dealer and technological partner with many of the industry leading companies and we also engineer, develop and manufacture our own line of performance products and wheels under the GMG World Challenge and LMS lines. With the technology, experience, and knowledge transferred from our professional race program, these upgrades will further refine will further refine your road going vehicle.
GMG is a leading installer and tuner of standalone engine management systems from Motec, Link, and AIM. As a development partner with GIAC, we can go beyond the ECU reflashing offered by most shops and, instead, perform a custom calibrated software tune for your specific vehicle with your specific hardware.
Using our Mustang 500SE 2WD and 4WD chassis dynamometer housed in a sound proof cell, our dyno test cell is capable of producing a controlled environment and proper airflow to simulate all road and race conditions. The end result is a properly calibrated tune whether you are running a stock style ECU or a complete independent standalone ECU. GMG’s dyno cell has been used by today’s leading automobile manufacturers and top tuners as well as military contractors due to its real world performance figures and unsurpassed repeatability.
GMG offers a concierge service based around a driver’s particular needs for each tuning project. Our staff is trained and well-versed in the needs of a particular driver and his or her intended use of the vehicle. Unlike most shops that sell parts out of a catalogue, GMG brand specialists have firsthand experience with the products, services and results involved around each vehicle modification. No two individuals are alike so no two vehicles are tuned the same way at GMG.ble in the country.
Join us! On April 1st, we will be hosting our Annual Open House event at our 30,000+ Sq. Ft. facility located in Santa Ana, California from 11am until 2pm. This event is a chance to learn more about us, our shop, and our philosophy about selling what we race. Both the Street and Racing shops will be open, with an ample display of our tuned supercars, as well as our Audi and Porsche race cars.
Features will include:
- A myriad of today’s top performance suppliers and vendor booths
- GMG tuned road cars and project cars that we’ve built over the years
- Get an intimate tour of our expansive 30,000 Square Ft. motorsport and performance tuning facility.
- Meet with our technology partners and get a chance to talk to reps from leading motorsport companies
- Check out the latest performance upgrades for your street car
- Check out the latest GMG product developments born from our race engineers
- GMG race cars will be on display, including the the Porsche GT3 CUP, GT3R, GT4 Clubsport and all new McLaren GT4
- GMG tuned street cars from Porsche, Audi’s, Ferrari’s, BMW’s Lamborghini’s, McLaren and more.
- Tour the GMG Race Trailers and get an opportunity to see the equipment the team uses throughout the year at the races throughout the country.
Over 25 of our leading vendors will be on hand to showcase their products and give you real insight straight from the manufacturer on upgrades for your car. In addition, they’ll all be raffling off products and giveaways throughout the day!
Ever wanted to meet the staff that is the beating heart of our race team? The Crew of our racing efforts will be on hand to ask any questions and give that ‘behind the scenes’ info that is sometimes hard to come by in the sport.
If you’ve been to one of our open houses’ before, you know that our (rather long) street turns into a virtual car show. We implore you to bring your best machinery out for display!
We’ll have some killer gourmet food trucks on-site, and international media coming in to cover the event.
Due to the size of the event and amount of people we expect, please arrive no earlier than 11:00 AM. The event will conclude at 2:00pm.
We look forward to seeing you all at our 2017 Open House!
Photo dump courtesey of KVK Multimedia












































































Join us! On March 19th, we will be hosting our Annual Open House event at our 30,000+ Sq. Ft. facility located in Santa Ana, California. This event is a chance to learn more about us, our shop, and our philosophy about selling what we race. Both the Street and Racing shops will be open, with an ample display of our tuned supercars, as well as our Audi and Porsche race cars.
Features will include:
- Presenting our team introduction for the 2016 Pirelli World Challenge Championship.
- Get an intimate tour of our expansive 30,000 Square Ft. motorsport and performance tuning facility.
- Meet with our technology partners and get a chance to talk to reps from leading motorsport companies.
- Check out the latest performance upgrades for your street car from today’s leading companies.
- Check out the latest GMG product developments and offerings.
- GMG race cars will be on display, including the 2016 Audi R8 Ultra’s, Porsche GT3 Cup, RSR & GT3R models, and Lamborghini Super Trofeo race cars.
- GMG tuned street cars from Porsche, Audi’s, Ferrari’s, BMW’s Lamborghini’s, McLaren and more.
- Tour the GMG Race Trailers and get an opportunity to see the equipment the team uses throughout the year at the races throughout the country.
Over 25 of our leading vendors will be on hand to showcase their products and give you real insight straight from the manufacturer on upgrades for your car. In addition, they’ll all be raffling off products and giveaways throughout the day!
Ever wanted to meet the staff that is the beating heart of our race team? The Crew of our racing efforts will be on hand to ask any questions and give that ‘behind the scenes’ info that is sometimes hard to come by in the sport.
If you’ve been to one of our open houses’ before, you know that our (rather long) street turns into a virtual car show. We implore you to bring your best machinery out for display!
We’ll have some killer gourmet food trucks on-site, and international media coming in to cover the event.
Due to the size of the event and amount of people we expect, please arrive no earlier than 11:00 AM. The event will conclude at 3:00pm.
We look forward to seeing you all at our 2016 Open House!
Photo dump courtesey of KVK Multimedia











































































