Although it was fitted with Porsche's outstanding PCCB binders, I never really got the chance to use them. The car had such incredible grip I never needed to remove my foot from the accelerator. Much like its more Spartan race-only brethren, the SR likes the tach to stay between 4100-6800 rpm where it provides a thrilling aural sensation.

GIAC and GMG conspired to increase engine output with software and a full exhaust system that includes headers, sport cats and mufflers, while weighing less than half of the stock system. Its lightened flywheel mass left it very responsive to throttle inputs. Simply letting off the pedal was enough to slow it through tight corners.

GMG outfitted this car with specially configured Moton shocks and Eibach springs. Most all the suspension bearings and joints have been replaced with hyper-engineered GMG bits. Those gorgeous wheels are Champion Motorsport's MS171, 19-inch beauties wrought from magnesium.

This Porsche wears GMG/GT3 aerodynamics including front and rear bumpers, center radiator exhaust vent, front splitter and carbon fiber rear wing. The cabin includes Euro-spec GT3 fixed-back seats, GMG's harness bar, and Sparco belts.

Intended as a "warm up" vehicle before more serious racing, the GMG SR maintained enough civillity to make it a streetable machine. Given the right stretch of road, this car would be nigh uncatchable.

World Challenge GT3 Street
You'd think James Sofronas, winner of this year's GT3 class at the Long Beach Grand Prix, would want his daily driver to be something posh and luxurious. A big Mercedes, maybe an Aston Martin.

No, James isn't quite ready to relax, not yet anyway. For the last several months he's been infusing his streetcar with race DNA. Basically, GMG has grafted much of its own race-proven technology onto this 2007 Porsche.

Yes, it's fairly over the top, but for some strange reason it works. Perhaps it's the understated paint and the lack of sponsorship decals. Scratch that veneer even a little and you will find a hugely developed vehicle, one that could quite possibly drive itself to the next Speedvision Challenge, and with a quick change of tires, compete.

This car wears many of the togs from the GMG GT3 models, including giant front and rear fenders that allow it to handle tires up to 10.5 inches in front and a whopping 13.5 inches out back. Although I've never seen a Pro Street Porsche, this one might fit the bill. Additional aerodynamics include GT3-spec bumpers, a carbon-fiber roof, assorted air collectors and vents and a sizable rear wing (complemented with LED taillights). There are even NACA-style ducts built into the undertray for additional cooling.

The car rides on GMG's own blend of Moton dampers and Eibach springs and features Porsche Motorsport RSR uprights in the front and rear that drop the roll center a full two inches. Further suspension development includes GMG's dogbone kit, its thrust arm kit, bump steer kit and bump and toe steer kit. They've also seen fit to add fully adjustable front and rear swaybars.

Beneath the 19-inch Champion Motorsport wheels are nickel-plated Brembo GTR binders (eight-piston front/15-inch rotors, four-piston rear/14-inch rotors). It's the first time we've seen this sort of brake treatment and hopefully not the last as it looks insanely cool.

The cabin has been revised to include GMG's Cup harness bar and additional rear bracing. Seats are Carrera GT units wrought from carbon fiber.

GMG corner balanced the chassis and gave it a competition-spec alignment. They also installed their lightweight WC Sport exhaust augmented with GIAC software. At the end of the day, the car produces 425 hp at gloriously high revs. It takes a special driver to appreciate such a setup. Sofronas qualifies as such.

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