as far as power is concerned, these guys are big here in the State of Georgia. They are about a hour and a half drive from the house, thought about doing some of the mods, seems reasonable but haven't pull trigger yet, too much other stuff to be done first and hey, who knows, might say the hell with it and let sleeping dogs lie. Called and talked to one of the reps on numerous occasions and asked them about the difference between the engines for the M37 and 370z and G37 and in so many words said none, pretty much the same, they seemed on the up & up. Did a YouTube search and there they were, it seems that they sponsor car shows late spring or early summer, here's the web site
http://www.z1motorsports.com/g37_370z/p ... ts_id=7223