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2011 Infiniti M Sedan

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…