Apparently, the differences as compared to the 2010 model aren’t extensive. The new GT3 RSR equipped with the new direct-injection powerplant as employed on the latest 911 road-legal cars. The RSR remained using the 4.0-litre version of the old boxer six, but with latest ECU mappings, intake and exhaust, now producing 5hp more than the 2010 model to 455hp. ...
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