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GMG is proud to offer minor and major restoration work for all vintage road and race cars. Our staff has years of experience in restoring vehicles to there period correct authenticity. So, if its a vintage race car that you wish to restore to its original glory or a vintage automobile which will be a cherished museum piece or a weekend driver, we have the experienced staff and leading industry contacts world wide to bring your cherished automobile back to its original standards.

We are currently accepting vintage road and race cars from Porsche, Ferrari, Lamborghini, Aston Martin and Lotus.

Specializing in all vintage 911 road and race cars including RS,RSR 956 and 962 race cars.

All vintage Ferrari automobiles including road and race cars.

GMG restoration services include:

• Mechanical restorations: engine,gearbox, suspension
• Electrical restorations: From wiring repairs to complete chassis re-wiring.
• Chassis and Body restoration: We can repair and restore aluminum body work,composite panels, monocoque chassis
• Interior restoration: We can restore any and all leather work our craftsman are some of the most talented in the world, there old world approach to leather working is some of the best anywhere

We also offer full fabrication, welding and machining services.

GMG specializes in the performance tuning of Porsche, Audi, and Ferrari automobiles. GMG works with today’s leading tuning equipment from worldwide automotive technology leaders.  We offer installation of performance-related parts and equipment plus we engineer, develop and manufacture our own line of performance products and wheels under the GMG World Challenge and LMS lines for Porsche , Audi and Ferrari vehicles.

GMG is a leading installer and tuner of standalone engine management systems from Motec and Link as well as AIM.  As a development partner with GIAC, we can go beyond the ECU reflashing offered by most shops to instead custom calibrate a software tune for your specific vehicle with your specific hardware.  GMG uses a state of the art chassis dynamometer housed in its own diagnostic studio with a controlled environment and proper airflow to simulate all road and race conditions. The Mustang 500SE 2WD and 4WD chassis dynamometer is housed in a sound proof room that flows over 100k CFM per minute.  The end result is a properly calibrated tune whether you are running a stock style ECU or a complete independent stand alone ECU.

GMG’s dyno diagnostic studio has been used by today’s leading automobile manufacturers and top tuners as well as aerospace and military corporations 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 catalog, GMG brand specialists have firsthand experience with the products , services and results involved around each vehicle modification.   No two individuals are alike so no to vehicles are tuned the same way at GMG.

GMG is proud to be a technology partner to Beissbarth and is one of the exclusive facilities in North America which has used this technology since 2004. Beissbarth is the OEM supplier of alignment measuring equipment to some of the leading automobile manufacturers in the world including Porsche, Audi, Mercedes, BMW, VW and Rolls Royce as well as the chosen aligner for Porsche Motorsport on the 911 GT3R Hybrid.

The Beissbarth aligner is one of the most technologically advanced aligners on the market, which is not a surprise considering Beissbarth has been manufacturing this type of equipment for over 100 years. The aligner is so precise and advanced that it is also used as a measuring device for collision repair to pinpoint problem areas. It even has the ability to compensate for lowered vehicles and vehicles with suspension geometry out of factory specifications.

Whether your car is stock and in need of alignment or your car has been lowered and you need to ensure it is aligned properly to minimize tire wear, GMG techs along with the Beissbarth aligner will get the suspension geometry into perfect specification, be it factory or custom, without any problems.

The level of equipment and training that each of our techs receive when it comes to suspension work has made GMG the facility that many dealers and other shops in Southern California send their alignment work to. GMG is the shop of choice when others can’t get a car into specification or if they have a car that is modified beyond the scope of a standard aligner.

For those customers who require more track-oriented alignments, GMG’s racing department offers specialized care and expertise including setting rake, adjusting ride height, corner balancing and more.

GMG offers specialized alignment services specific to Porsche, Audi, Ferrari, Mercedes, Bentley, Rolls Royce, Lamborghini, Lotus and McLaren.

CORNER BALANCING

GMG’s experience in chassis set up is second to none in the industry and now road car customers can benefit from this experience.

GMG offers competition corner balancing and chassis setup for race cars and road cars which are equipped with coil over type adjustable suspensions. Corner balancing is a key component in improving your vehicles handling a proper corner balance will optimize the vehicles handling characteristics while also improving the vehicles balance. A corner balance is simple effective way to get the most out of your vehicles handling performance.

GMG offers custom electrical work including the building of custom chassis and engine harnesses for engine swaps, race cars, standalone engine management systems, data acquisition systems, telemetry, in- car video systems for driver coaching and more.   All work is done by seasoned electronics specialists to meet or exceed OEM manufacturer specifications or aerospace /MIL spec requirements.

If you are restoring a car and need a custom harness, GMG is capable of providing a stock type of harness or one that integrates modern electronics with full data acquisition and multiple systems.

GMG also handles electronic traction control, launch control, antilag integration, standalone ECUs, suspension telemetry, shock pots, and custom dash systems from Motec , AIM , and Bosch Motorsport.

GMG does custom race electronics for modern and vintage on or off-road vehicles from sprint to endurance racing, with a focus on getting you the performance and data you need in your unique driving environment. We specialize in several vehicle platforms:

• Modern day Porsche GT3 Cup / RSR
• Vintage Porsche race cars such as the 956/962 platform
• Ferrari 360/430 Challenge and race cars, F40, F50 racing electronics
• BMW M3 club racing or pro racing configurations
• Audi R8 GT3 LMS /Grand Am /S4 Competition and Audi Vintage race cars such as DTM, Supertouring, TransAm, IMSA and all Audi Rallye cars
• GMG is a dealer of : ( logos of the following companies please)
• Motec
• Bosch Motorsport
• Link
• AIM
• Chase Cam
• GMG is a proud to be an authorized technology partner for GIAC, and APR.

GMG features a state of the art Mustang AWD 500SE Chassis Dynamometer with a sound proof environmental control test cell. Our test cell is a state of the art unit, which offers unparalleled repeatability and consistency. The Mustang 500 SE is an Eddy Current dyno, which has a 1500 wheel horsepower maximum measurement capacity in 2WD and 2500 wheel horsepower maximum measurement capacity in AWD. The Mustang 500 SE is also very safe on the drive train of an AWD car due to the synchronization of the front and rear wheel speeds, so, there is no chance of damage to the center differential. This is possible thanks to a drive belt connecting the front and rear rollers, a proprietary design of the 500SE. When the dyno is in 2WD, the clutch is set accordingly so the rear wheels spin independently of the front. With the Mustang 500 SE, we can also test 2WD cars that have very sensitive traction control systems. We can also test 2WD cars in AWD mode if we encounter a 2WD car that will disable the car if it doesn’t sense the front wheels spinning in sequence with the rears.

At the heart of the test cell are two 10 HP fans with a combined flow of 70,000 CFM. These two 10 HP fans extract exhaust gasses out of the test cell, while bringing fresh outside air in, creating a realistic driving scenario. The test cell is also insulated, so while a car is being run on the dyno, it is not disrupting the other aspects of our shop. With this sophisticated equipment we can test and tune any 2wd or 4wd vehicle in the market today. Although GMG specializes in Porsche, Audi, Ferrari and Lamborghini, our Dynamometer is available to be rented for tuning and testing purposes by the hour or by the day for any vehicle including cars and trucks, gasoline or diesel powered.

GMG currently works with several OE and OEM manufactures testing various products and systems. So regardless of the vehicle our test cell is the highest grade of equipment available to test, tune and verify your vehicles performance.

Dyno rental is available by the hour or by the day/week.

Call to schedule your appointment today

*Includes test cell, three horsepower pulls, wideband for air/fuel ratio and boost if applicable. A vehicle owner can learn a lot from the dyno. Other then the obvious information like horsepower and torque, the owner can see how smooth the power band is, what air/fuel ratio he is running at 100% throttle, and (if applicable) what boost they are at every RPM. With this information you can analyze many things the cars doing. For example, you can look at what air/fuel ratio the car runs when at full boost.

Tuning

GMG Custom Tunes GM vehicles, Subaru’s, and Mitsubishi’s vehicles. All modern cars utilize electronic fuel injection that is controlled by the cars ECU. The ECU (Engine Control Unit) is the brain of the car that gives commands on timing, air/fuel ration, and other parameters that run the car. Tuning is the act of changing these parameters in the ECU for more power and torque, smoother power delivery, and different fuels. Some modifications like bigger injectors, turbos, intakes, ect. will make impossible for the cars to run on a stock ECU tune. These types of scenarios will require custom tuning. Tuning with our Mustang MD-500 and test cell is ideal because it creates a realistic environment on which to tune with. This helps ensure that the tune we create on the dyno, will work just as well on the street and at the track. We custom tune most late model Subaru’s and all Mitsubishi Evolutions 8

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.