I had the nameless magnaflow muffler on my 11 wrx hatch. After 15k I had to take it off. The drone at cruising speed made the car Undrivable for me. I don't consider myself overly sensitive to noise, but I do spend a lot of time in my car (30k per year or more). At first i thought it was a great exhaust, but overtime, it became loud. I tried wrapping it, foam in the spare tire area, etc to try to reduce the noise to no avail. I am back to stock for now. Considering a maddad whisper but not liking to price. Aside from the cruising drone (when hot especially) it did sound great. Good luck. I would love to try the 5" version to see of that configuration has different acoustics.