question, I have came across a unused gtm lower manifold conversion that im most likely going to buy in a few days when pay day hits. how rare of a thing is this? I just read through I don't know how many pages for forums and gtm's downfall but it never seem to be posted that they got the manifolds mass produced. last thing I read from that forum was they were at testing. any info you can give me would be great would love to get the gtr look in my engine bay. just curious if what I came across is a unicorn find. thanks for your time.