Car

STREET TUNER: The Street Tuner (ST) class features a variety of sports cars and high-performance compacts that are as equally popular with KONI Challenge Series competitors as they are with today’s consumers. Unlike the bigger GS class where V-8s are allowed, ST is limited to four- and six-cylinder engines, although turbochargers and superchargers are permitted.

Engines produce between 170 and 240 horsepower depending on the car, while minimum weights range from 2,200 lbs. to 3,125 lbs. Fuel tank capacities range from 16.9 gallons to 17.9 gallons in the Mazda RX-8. Most competing ST cars have 17-gallon fuel tanks, including the Acura RSX-S, and the BMW 330i. Other popular vehicles in the ST class include the Chevrolet Cobalt SS Supercharged, Acura TSX, Subaru Legacy and the Mini Cooper S. Like the GS class, the only major modifications allowed in ST are in the area of safety. Top speed for ST race cars is about 135 mph.

Chassis: 2010 Mazda RX-8
Engine: Rotary Engine
HP: 275
Engine Builder: Mazda North America
ECU Specialist: Second Street Tuning
Transmission: 6-speed stock gearbox

Brakes

- Calipers: Mazda
- Rotors: Mazda
- Pads: Cobalt

Wheels

- Manufacturer: RacingHart
- Size: 17×8

Electronics

- Data Acquisition: Motec
- ECU: Mazda