Nissan GT-R gets light upgrades for new model year

Nissan revealed the next iteration of the Japanese-spec GT-R supercar last week. The 2013 model will enter that market sometime this month, but those sold in the U.S. will debut in January and be sold as 2014 models. Improvements span the engine, chassis and interior, along with some trim upgrades. The only thing Nissan didn't specify is the base price, which could break the six-figure mark this year.

Output stays the same from the twin-turbocharged 3.5-liter V6 at 545 hp, but new high-output fuel injectors improve midrange response and acceleration at higher rpms. A relief valve has been added to the turbocharger bypass, which helps sustain acceleration at high rpm. A new baffle in the oil pan stabilizes oil pressure during high-performance driving