As a new Z owner, this was the 1st mod and i LOVE it, I cant believe an exhaust alone could do so much!
According to the but dyno it does feel stronger in acceleration, when the stock set up was on you could feel the back pressure/sluggish throttle response.
The intake should make a noticeable difference. Loving the Z
Mod list
Springs Tein S tech
Stillen Gen 3 intake