Exterior 2nd Gen Most liked posts in thread: Any idea what exhaust this may be?

The blue is done on the new tips during manufacturing. Typically it is indicating the tips are made from polished titanium. The blue comes about as a result of heating up the metal.

 

It looks like a titanium tip that's been heat-treated to turn blue. My guess would be Invidia's cat-back with titanium tips? See, eg.

 

Arqray (available here in the US, or atleast they used to have a distributor here)

 

Ooops, my images might not work. If that's the case, just google image search 'arqray mini' and you'll find them.