I have a japspeed 3 inch exhaust system.
took the dcats out as the decibels output was probably 150
refitted the standard cats ... still on the loud side at 125 but my emissions were always good.
from a 0.2 to fail I have been at 0.02
you get that from a grey Z...just think how it feels in my green apple candy Z .... they all look like kids in the candy shop lol
overall usually most Zeds will draw attention as you don't see that many around and they look Z-uper