i found out that they are pontiac wheels i have them on my car and they are called mc2's however i am having a problem with the right rear rubbing

 

So they must be 18" then....dealer option or pontiac option?

 

they are 18's im not 100% sure on who offered them but i just bought my car and those were on it

 

Those look nice! :cheers

 

Dealer option. They were discontinued because of cracking.

Larry

 

Here's some info about MC2 wheels from the 'other site':
MC2 guys. Please come in: Dealer Installed Wheels - LS1GTO.com Forums

 

They look sweet.. too bad.