The BMW lineup is known as the "Ultimate Driving Machine" for the level of performance delivered by standard cars in the lineup. While that might be changing a bit with cars like the X1 being added, for the most part it rings true. The BMW M3 takes that even further, by any measure an impressive performance vehicle. BMW took the formula a step further with the orange, overseas market-only M3 GTS. Now comes speculation that BMW could be even going beyond that, with an M3 GTS-R. If a power bump, upgraded suspension and braking system, aerodynamics tweaks and a dieting program for the sold-out M3 GTS wasn't enough for you, more could be coming. More as in more weight reductions and more power, as well as further changes to