Header would be a one off type situation as far as I remember. When we were down at FI, they had some headers for Mustang V8's - They were works of art, like sculptures. Regardless, I think Tony or us will be working with the rest of you guys.
Here is the video for the G37 on Solo's car that we helped get on:
YouTube - Infiniti G37 Fast Intentions Intimidator Exhaust