Hey so I was reading this blog post about your Z back in september 2012 and you were mentioning that you were trowing the code P1239 and the car was going into limp mode because of the position of the two air filters and that you "making a air box out of a piece of aluminium from lowes to prevent direct air contact with the bottom filter".

I am having the exact same problem with my Stillen SC Z, did this fix your issue? Do you think you could share with me some photos of what you created, or explain to me in a little more detail exactly what you did?

I really appreciate it man!