The official debut of the new BMW M4 Coupe is just around the corner, so we are seeing more and more of the car's color options.

We've already seen the Austin Yellow Metallic and the Yas Marina Blue Metallic prototypes out testing, and now our spy photographers managed to catch an M4 Coupe->ke4183 testing in a sleek Sakhir Orange. Alongside this sweet hue and the others we've caught, customers can choose between a few other exterior paints, including: Alpine White, Mineral Grey, Black Sapphire, Silverstone and Mineral White.

In a previous release, BMW ->ke178 confirmed that the M4 Coupe will carry an in-line six-cylinder engine with BMW M TwinPower Turbo technology that will deliver approximately 430 horsepower and 369 pound-feet of torque. Not only is this engine more powerful than the previous V-8 used in the M3->ke2366, but is also about 25 percent more fuel efficient. The model will also weight a little under 3,300 pounds, which will help it deliver outstanding driving dynamics.

We expect BMW to release the new M4 Coupe in early 2014.

Click past the jump to see more spy shots of the M4

Spy shots

It's not too surprising to see that the production version of the BMW M4 Coupe will look nearly identical to the M4 concept that we saw earlier in 2013. This means it will wear the usual M design elements, including an aggressive front apron, large heat extractors behind the front wheels, aggressive side skirts, and a stylish rear apron with quad tailpipes and a diffuser.

Speaking of the rear end, this is about the only place where we see the production model varying from the concept. This could be fa result of the camo hiding the details, but it looks like the production model will lose the vents on either side of the rear bumper.