Just two weeks after it was announced that development of the Type 997 Porsche 911 GT3 race cars had come to an end , the first prototypes for one of their successors has been spotted. Our spy photographers recently snapped these photos depicting a prototype for the new Type 991 Porsche 911 GT3 RSR race car, which was testing at a secret location in Europe.

Porsche has already confirmed that its new race cars based on the latest generation of its iconic 911 will be launched in time for the 2013 motorsport season, so we should be seeing the first official photos and specifications soon.

This particular prototype is for the range-topping 911 GT3 RSR, though new versions of the entry-level 911 GT3 Cup and mid-range 911 GT3 R should also start appearing in due course. A new 911 GT3 R Hybrid is also possible.

We can tell it’s the RSR by its ultra-wide fenders and complex aero components found at the front and rear. RSR models also come with intakes on the leading edge of their rear fenders, similar to those found on turbocharged 911 variants, though on the race cars these are used for additional cooling. Porsche engineers have tried to hide these under some camouflage gear.

Overall, the new 2013 RSR looks to be much more streamlined than the outgoing version. Its hood also sports much larger air ducts and the rear diffuser looks to have been completely revised.

Power should come from an enhanced version of the 4.0-liter flat-six found in the outgoing car, though horsepower limits will once again be restricted in line with the various race regulations the car will be competing under. The transmission will likely be a paddle-shifted, sequential six-speed.

The new 2013 Porsche 911 GT3 RSR will start delivery in Europe sometime next year, but it won’t be ready for any American competitions until 2014. Pricing likely won’t change much from the half a million euros the outgoing car commands.