Less than 24 hours before the grand opening of the 2012 edition of the Chicago Auto Show and Nissan has lifted the covers off its mildly updated 370Z sports car that goes on sale in the U.S. next June as a 2013 model.

The changes on all configurations of the 370Z including the Coupe, Roadster and the NISMO edition are extremely subtle.

Starting with the Coupe and Roadster, on the outside, you’ll probably notice the revised front bumper that gains vertical LED daytime running lights in a similar position that the older 350Z featured reflectors.

Nissan’s designers also added a red reflector to the rear fascia that replaces the previous black center cover. The regular coupe now rides on newly designed 18-inch wheels while the Sport Package equipped models gain revised 19-inch alloys, red-finish brake calipers, and what Nissan describes as “Euro-tuned” shock absorbers.

The dark-finish fuel gauge trim and the addition of two new exterior colors called Magma Red and Midnight Blue complete the upgrades on the regular Coupe and Roadster models.

As for the NISMO 370Z, the only changes compared to the 2012MY version concerns the addition of new Bose Premium Audio Package with two additional speakers and two subwoofers, and the introduction of gun metallic dark-finish 19-inch wheels, and Nissan GT-R style high-rigidity brake hoses and performance brake fluid.

The NISMO model does not get the revised front and rear fascias of the regular 370Zs.

There are no changes under the hood with the 370Z Coupe and Roadster motivated by a 332HP 3.7-liter V6 and the NISMO edition by a 350HP 3.7-liter V6.

Nissan said it will release more information including pricing closer to the 2013MY 370Z’s launch date in June.

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