Dec 18, 2021 · The Nismo makes like 18 more HP just due to the headers exhaust, and tune. It's minor but has other benefits like suspension and brakes.
May 16, 2019 · Engine, Intake and Exhaust - 400HP package from Z1 motorsports - Here's a video of moncef over at AdminTuning doing a tune on my 2013 G37s ...
Jul 3, 2015 · I have it with an uprev tune and I am getting 337 whp. Huge improvement over stock, however very raspy when reving down from 3k-2k rpm.