I am looking at getting a set of turbo twist wheels and need to know how to tell the difference between the originals and replicas. I have searched the forums but am still unsure. Thanks in advance.

 

originals will have a porsche part number by the valve stem

 

If you can hold them you will notice the back of the solid twists will have an indentation in them. the hollow ones will feel more "round" (on the spokes that is)
also the valve stem is different on the two types. I had a guy with a 993TT show me how they were different on his car than on mine. His were 18's too.

 

There is also a little symbol on the bottom of a spoke that looks like the symbol pie. Those are replicas