Here is a new rumor to which we tend to give credibility considering the number of special edition models that have been rolled out by Porsche lately.
According to TeamSpeed the German automaker is planning to ‘expand’ its 911 GT RS lineup by launching yet another special edition, which will use a 4.0-litre flat six engine instead of a 3.8-litre in order to produce an extra 50 horses, meaning that total output will be 500 HP. Various other sites even mentioning that this 4.0-litre version will use a new PDK-S dual clutch transmission which means gear shifting will become ever faster.
The Porsche 911 GT3 RS SE will be produced in a limited run of 500 exemplars, with the first unit expect to roll off the assembly line at the end of May. According to the same source the Porsche 911 GT3 RS SE will be unveiled on April 7th, so if everything turns out to be true then we should be back with more details in around three weeks.

Source: Teamspeed