Going back around 10 years now I fitted then a similar looking mx5parts SS exhaust back box to my NC. The sound from it was too loud and droning, I got out of the car sometimes with it still resonating in my ears. I ditched it after 6 months and bought a Cobalt. That was much quieter but still had a sporty burble, no droning.
Things could have changed with the manufacturing of that particular one now, who knows.