Just got my Y resonator out, and OMG the sound is amazing. BMW should have made it stock. You can hardly tell ANY difference from the inside, but when you are outside or your window is down you can't help but rev it every chance you get. The sound is so refined and smooth, and just loud enough. No drone, just a beautiful V8 TONE
. I recommend it to everyone that has a V8, you will not regret it. If you are still unsatisfied with the tone, you can cut off ONE
of the rear mufflers, but try the Y resonator first.