NISSAN HAS ANNOUNCED a number of detail changes for its flagship GT-R, which will go on sale in the Japanese market in early December before hitting the rest of the globe in 2010.

At a glance,  the 2011 Nissan GT-R looks exactly the same as the current model. In fact, the only external change is to the rear diffuser, which now features the same carbon-fibre panel used by the high-performance GT-R SpecV.

Instead, most of the upgrades are beneath the GT-R’s steel and alloy skin.

The suspension now receives stiffer rear radius rod bushings and revised spring and damper rates. The SpecV’s suspension system also sees a few detail changes, further enhancing handling and responsiveness.

A hexagonal-mesh catalytic converter design reduces exhaust restriction and boosts low and mid-range throttle response. Nissan doesn’t make any claim about power increases, however, and output from the GT-R’s 3.8 litre twin-turbo V6  remains at 353kW.

Inside, a new USB input with iPod integration has been added to the car’s entertainment suite, and the Japan-market navigation system also gets some new enhancements.

The updates apply across the entire 2011 GT-R range, and will enter Japanese showrooms on December 7.

Updates for Australian-sold GT-Rs  are on their way and details have yet to be confirmed, however Nissan says it is definitely pushing for satellite navigation to be added to the GT-R’s local spec sheet.