In 2005, GM selected The Racer's Group to represent the automaker in the Grand American Rolex Sports Car Series. GM's Pontiac Motorsports division teamed up with Pratt & Miller to design and build the car. The Pontiac GTO.R is a Pratt & Miller designed racecar, designed specifically to the rules that govern the Grand American Rolex Sports Car Series GT class. Competing under Grand-Am's Prep 2 rules, the GTO.R joined the competition in 2005, doing battle with legendary cards like the Porsche 911 GT3 Cup Car, BMW M3, Chevrolet Corvette, Maserati Trofeo Light and Ferrari 360.
In 2006, the #65 TRG GTO.R, piloted by Andy Lally and Marc Bunting, won the 1st place trophy in the Grand American GT Class in the team, drivers, and manufacturers competition. This pinnacle of success put an exclamation point on the two-year Pontiac/TRG partnership.
The car is designed around a GM LS2 small-block V-8 engine, and is comprised of a purpose-built tube-frame chassis.
Birth of a Racecar
Watch a featurette from the SPEED Channel about the design and creation of the GTO.R.
GTO.R Introduction
View images from the media introduction to the TRG GTO.R's.
Pontiac GTO.R Specifications
- Engine: 6.0-liter LS2 small-block V-8
- Horsepower: 393 @ 6400 rpm
- Torque: 410 lb-ft @ 5200 rpm
- Maximum RPM: 6800
- Chassis: Purpose-built tube frame
- Wheelbase: 109.8 inches
- Track: 61.5 inches front; 60.4 inches rear
- Curb weight: 2,700 lbs.
- Suspension: Independent unequal A-arm front and rear
- Brakes: Four piston AP calipers with 12.9-inch vented steel rotors
- Wheels: 18 x 11.5 inches front and rear
- Steering: Power-assisted rack and pinion
- Tires: Hoosier 295-660R18 front; 295-675R18 rear
- Transmission: Xtrac 370GT 5-speed sequential transaxle
