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Infiniti has been working on an updated version of the M model for 2011.   They had hoped to have it ready for 2010, but ran into issues with design and performance.  

This year, they're back with a third-generation M sedan with more power and more features.  In the rear-drive M37 and all-wheel-drive M37x, the new 3.7-liter V-6 engine, develops more power than the 3.5-liter V-6 that it replaces, while yielding improved fuel economy.

Relying upon VVEL (Variable Valve Event and Lift) technology, the V-6 generates 330 horsepower and 270 pound-feet of torque.

The M56's new 5…

The 2011 model year is turning out to be one of the most important in Infiniti's now 21-year history -- with the introduction of the all-new, next generation versions of the Infiniti M luxury sedan and Infiniti QX luxury SUV leading the way. Both vehicles are now available at Infiniti retailers nationwide.

And, while that might be more than enough for most brands, 2011 also brings the introduction of two important product extensions to the award-winning Infiniti G line -- which will be announced August 13th and 14th at the annual Pebble Beach Concours d'Elegance.

The Infiniti EX, FX, G…