Global Motorsports Group (GMG) Racing
www.GMGRacing.com
Founded in 2001 by James Sofronas and Fabryce Kutyba, GMG has quickly established itself as North America's premier performance tuning facility. What began as a small 1200 sq. ft. shop, maintaining two race cars, has grown into a 15,000 sq. ft. state-of-the-art performance tuning, racing and service facility located in (Orange County) Santa Ana, California, located directly across from Porsche Motorsport North America (PMNA). This close proximity offers GMG a clear advantage when upgrading performance and developing racing products.
Sofronas and Kutyba have been actively racing professionally for over 10 years, especially in World Challenge. The have raced in the most competitive series in North America in both Porsches, Audis and BMWs.

James Sofronas
Age: 41
Hometown: Newport Beach, CA

World Challenge Car Number: 14
Car: Porsche 911 GT3
World Challenge Class: GT
Driving Highlights:
2010: Sits second in the GT Drivers’ Championship and won the Round 9 race at Mid Ohio Sports Car Course. Sofronas has finished second in four races this season.
2009: Sofronas had his most successful season in World Challenge, finishing 2nd in the GT Drivers’ Championship and earning his second and third career wins (Long Beach and Mazda Raceway Laguna Seca). Was also on the podium at Watkins Glen and Mid-Ohio and was the fastest qualifier at Autobahn and Road America.

Dino Crescentini
Age: 49
Hometown: Malibu, CA

World Challenge Car Number: 4
Car: Porsche 911 GT3
World Challenge Class: GT
Driving Highlights:
2010: Sits 7th in the GT Drivers’ Championship and won Round 2 race at St. Petersburg, while finishing second at Long Beach.
2009: Finished a career-best ninth in the GT Drivers’ Championship despite missing two races after a crash in practice at Long Beach. Earned his second career win at Watkins Glen.

William Ziegler
Age: 55
Hometown: Ponte Vedra Beach, Fla.

World Challenge Car Number: 05
Car: Porsche 911 GT3
World Challenge Class: GT
Driving Highlights:
2010: Sits 12th in the GT Drivers’ Championship. Best finish of season was an 8th in Round 11 at VIR.
2009: Finished 10th in the World Challenge GT Championship, earning Rookie of the Year. Recorded two top-10 finishes with a season best finish of eighth at Sebring.
Related Articles
Lexus unveils all-electric LFA Concept
After a couple of public sightings in the U.S. and Japan over the last few months, Lexus came one step closer to making an LFA successor a production...
Toyota unwraps GR GT supercar and GR GT3 racer
At long last, Toyota has revealed its next Gazoo Racing performance model and it’s a real banger. The GR GT is a 641-horsepower V8-powered, low-slung...
Genesis reveals first Magma production car and supercar concept
After spending the last 18 months showing renderings and concepts, Genesis has finally taken the wraps off its first Magma car, the GV60 Magma, a...
Formula DRIFT Long Beach 2025 Round 8: Shoreline Showdown
Formula DRIFT closed out its 2025 season in true Long Beach style — on a brand-new course built specifically for the series. The Shoreline Showdown...
Unitronic FeatureBox Lets You Control Your VW or Audi from Your Phone
The Unitronic FeatureBox and UAF Control App give VW and Audi owners more control than ever. This setup lets you adjust key performance settings right...
Liberty Walk Body Kit Makes the Corvette C8 a Street-Legal Beast
If you thought the C8 Corvette was already jaw-dropping, wait till you see what Liberty Walk did with it. Their LB Silhouette Works body kit turns...




