The 1 Series M Coupe packs a 340-horsepower version of the twin-turbo 3.0-liter six from the Z4 sDrive35iS in a package weighing about 3,300 pounds, with power fed to the wheels exclusively through a six-speed manual. Pricing is slated to come in between those of the existing 135i and M3, placing it somewhere around the $45k mark.