From Dodge press:
New for 2011, the Dodge Nitro Heat 4.0 lifestyle package joins the Detonator, Shock and Heat models that arrived on the scene in 2010. The new Nitro Heat 4.0 comes standard with a five-speed automatic transmission, standard Uconnect®Phone and an upgraded eight-speaker sound system. Of course the Heat 4.0 would not be complete without the powerful 4.0-liter V-6 engine as standard equipment. The all-aluminum 4.0-liter overhead cam V-6 engine delivers 260 horsepower (194 kW) and 265 lb.-ft. (359 N•m) of torque.