Porsche will slightly update the GT3 aesthetically.
Porsche continues to fiddle with the 911 GT3 Touring, as we can see from our latest spy shots. This time, Porsche has the Touring out for some winter testing ahead of what appears to be a light facelift. So far, changes are concentrated around the rear of the car. Unfortunately, the snow makes it a bit difficult to spot them.
From what we can tell, the GT3 Touring should get a new rear bumper, as evidenced by the slats cut into the corners of the car. We're not quite sure what these are, but a few possibilities have emerged. For some reason, Porsche may need additional cooling or a new exhaust, for example.
It's possible these could also be used to test acoustics. Porsche had issues getting the manual GT3 Touring to pass noise restrictions in California, most notably. Next to the diffuser, we're fairly certain the GT3 Touring will get a new lighting arrangement. Prior versions of the car have featured reflectors placed near the diffuser, which now appear to be gone.
However, the snow does obscure our view of them. If you take a look at the 911 ST recently seen testing with the GT3, you'll note the old GT3 bumper has snow in different places, which leads us to that new bumper layout theory.
Of course, a new bumper could hint at some mechanical updates to the GT3 Touring. Being a rear-engine car, the 911's bumper is very much affected by the engine and exhaust behind it. Perhaps Porsche is working on a new exhaust system for the GT3 Touring? The tips don't appear to be any different than those buyers already get on their Tourings.
Again, a new exhaust could make it easier for the Touring to pass noise or emissions regulations the world over. It still doesn't explain the four slats in the bumper. For now, we'll assume they're for development purposes until new information about them comes to light.