Ebay 4cyl catback exhaust fits v6 just fine!
I just installed one of these stainless steel, super low price ebay 4cyl cat-back kits. - I can confirm that it bolts up perfectly for the v6. Every part, including exhaust tip, aligned perfectly. The sound is not raspy, but does have some drone on the interstate. (nothing like a mustang though)
I'm sorry that I cannot post pictures, I was more focused on getting it finished before dark today.
I don't know if this fitment situation is common knowledge around here or not, but I am just trying to be helpful, since I was at a loss to find a cat back for the GTZ within
a reasonable price range. :)
The tip of the exhaust is right where it should be, in all directions. The hangers fit perfectly. No forcing anything; no contact with the body or deadaxle in the rear.
I took the time to go buy some stainless hardware for the mounting as well, but you don't really have to.
Later !