BMW only reserves the GTS nameplate for the hardened, lightened versions of their road going M cars. The last car to wear the GTS badge was the E92 M3 GTS, which in its pursuit of sportiness applied the tried and true formula of removing weight and adding power to make it one of the finest M3s ever to come out of a BMW factory. Now we get an almost undisguised glimpse of the new F80 M3/M4 GTS via spy shots that hit the web recently.
The spy shots reveal the car with minimal camouflage that hide a revised bumper and is also plastered on the new rear spoiler. This prototype wears decals that indicate it to be a safety car, however all the aerodynamic and visual modifications tell us that it is definitely something more than just a safety car. The fixed, big rear spoiler looks similar to the one found on the last M3 GTS. Moreover, the front bumper looks to have been revised with larger air intakes and a new splitter. Reports of other test mules indicate that the car will also have new lightweight recaro seats and new lightweight alloy wheels to remove weight. To remove even more weight, we expect BMW to make use of materials such as carbon fiber and aluminum in the construction of the car.
As the current M3/M4 make produce 431 horsepower and 406 lb-ft of torque, expect the GTS versions to make 450-500 horsepower via added boost from it's twin-turbocharged 3.0L straight six engine. The GTS will most likely be a limited production run with a hefty premium over the standard M3/M4.