I was just playing this game recently and never really brought up the question but I bought the Opera Performance 350Z on the game. Well I was just wondering where I might find Opera Performance on the web I have looked everywhere and just find people talking about a company called Opera Design but no Opera Performance and at that still on official site for either.
If anyone has heard of or knows of this company I would greatly appreciate it. I am just curious what they offer as far as visual upgrades and or performance modifications.

 

The Opera car body didn't exist when they made GT4 - someone "designed" it. However RAZO (they have the racing 240SX/Silvias in the various Gran Turismos) teamed up with Polyphony to build the body kit:
http://www.carmate-usa.com/html_razo/razo_rsaero.htm

Performance stuff I dunno.