Mercedes will start to sell the SLS GT3 from the summer of 2011.
Tech details are not many, but we know that most probably the car will powered by the new 5.5 liter AMG engine.
With special software, the engine will produce about 600 hp.
For comparison the BMW Z4 GT3 costs 300.000 Euros, so most probably the new GT3 will cost more then 300.000 Euros.