Hello fellas!
I just installed the N55 mids and what i have noticed is:
No big difference in sound, I thing it is a bit deeper and noisier but my girlfriend most likely won t notice the difference... (haven t tried yet)
No faults as expected
I don t feel any difference in HP, better revving at high rpmīs.
I DO feel a huge difference in throttle response, less turbo lag and it feels more linear, I really like it.
Drone between 2100-2450 RPM is totally gone (actually it felt strange not to have it) but from 2500 to 2700 there is now a bit, nothing like before but still something.
Good mod for the price.