BMW recently took the wraps off its new top-of-the-line 2011 335iS Coupe and Convertible – the key attraction of its newly pepped up 3 Series coupe and convertible lineup. Developed chiefly for the North American market, the 335iS marks BMW’s attempts to launch a new mid-way model the 2011 BMW 335i and the 2011 BMW M3.

Equipped with a tweaked edition of the twin-turbocharged N54 3.0-liter inline-6, the new 335iS now boasts 322 horsepower and 332 pound-feet of torque. The addition of a unique ‘overboost’ feature enables the engine to attain a 10-second burst of up to 369 pound-feet of torque; with the car claiming a top speed of 150 mph.

With a standard six-speed manual transmission channeling the car’s power, the BMW 2011 335iS can attain 60 mph speed from a standstill in 5.1 seconds.

However, the car also comes with an optional seven-speed dual-clutch automated manual, which further helps the car trim another 0.1 second while achieving a standstill to 60 mph speed.

BMW, which will also be introducing a few ‘subtle’ interior as well as exterior changes to the rest of the 2011 BMW 3 Series coupe and convertible lineup, is planning a March release of the new 2011 335iS, alongside the commencement of sale of the new range of the existing models.