The 370Z NISMO Roadster is billed as a close-to-production concept.

Nissan has introduced a close-to-production concept called 370Z NISMO Roadster at the Chicago Motor Show.

Essentially a topless version of the existing 370Z NISMO coupe, the Roadster benefits from a number of visual updates including a deep front bumper that incorporates LED daytime running lights and a strip of red trim, black headlight bezels, red accents on the leather-wrapped roll bars and concept-specific rear spoiler crafted out of carbon fiber. The topless Z sits on 19-inch forged aluminum wheels wrapped by Y-rated Bridgestone Potenza tires.

Inside, the concept stands out from a stock 370Z Roaster thanks to Recaro bucket seats, a custom instrument cluster and a three-spoke steering wheel upholstered in a combination of leather and Alcantara.

Power comes from a 3.7-liter V6 engine that features Nissan's Variable Valve Event and Lift technology. A re-mapped ECU and a H-configured exhaust system help the V6 generate 350-horsepower - 18 more than a stock Z - and 256 lb-ft. of torque. A seven-speed dual-clutch transmission controlled by shift paddles sends power to the rear wheels.

Performance is further enhanced by a viscous limited-slip differential with a shorter final drive but Nissan has not provided precise figures. A NISMO-tuned suspension setup and bigger brakes all around help keep the cavalry in check.

Nissan has not indicated what the future holds for the 370Z NISMO Roadster concept. However, we suspect that it will be added to the automaker's catalog in the next year.

Photos by Brian Williams.