Version 3? I'm not sure what you mean by that. I have the "export" version. I believe that CG makes three different versions. One is TUV certified, one is the "export" version which is what I have but I'm not sure what the third version is.

Very pleased with how it sounds. It gives off the classic Porsche sound which is perfect for the Turbo. I get many compliments from folks when they hear it.