Completed the Stillen Generation 3 on my 2013 Nismo. The install took 4.5 hours. I did not remove the top part of the engine cover or any of the engine supports. I definitely feel more low end power and a little deeper engine noise. The bumper was easier to remove than I thought but its not for the faint at heart! I was really concerned when I first pulled on it but it came off just as this forum reported.
I want to thank all of the members that were a part of the DIY install. It was a GREAT HELP!:
http://www.the370z.com/diy-section-d...de-ak370z.html