The upcoming 2014 F80 BMW M3 was spotted on U.S. soil. The F80 sedan was seen in Southern California where it was undergoing testing trials. The video below gives us a side look of the camouflaged M3 and it also reveals its exhaust note upon starting.

The high-revving six-cylinder in-line engine with BMW M TwinPower Turbo technology newly developed for the new BMW M3 Sedan and BMW M4 Coupe produces maximum output of approximately 430 hp. Its peak torque soars far beyond 500 Newton meters (369 lb-ft), out stripping the figures recorded by the outgoing BMW M3 by well over 30 per cent.


And yet the engine also achieves a reduction in fuel consumption and emissions of around 25 per cent.

BMW M3 and M4 will debut at the 2014 Detroit Auto Show.