Originally Posted by UNKNOWN_370

It's going to take a redesign to fix this. If Nissan added more sound deadening the car will weigh too much. They added a little in 2011. more in 2012, and a little more in 2013. If they put G37 sound deadening we'd gain 100lbs.
In the case of the Z, performance before noise issues. At the end it's a performance car. I know plenty of reviewers have called the car out. But if you did a owner count. 75% of owners seem to deal with it because they dont find it severe or it doesn't bother them at all. 25% complain and find it to be annoying.
So it doesn't warrant Nissan to make extreme changes in noise reduction. Furthermore, at sales of 5,500 units a year. Nissan isn't making enough money on the car to fix multiple issues. If Nissan did fix things though. The noise level to most owners is on the low level of the totem pole.