2012 Sport / manual / NSBP
Definitely quieter at lower speeds, not so much at higher speeds because the engine noise takes over. I'm currently ordering few more parts that I want to install under the dashboard and in the seats, so I will be silencing the front firewall too when I take out seats and carpets. I think the front of the car will make the biggest difference at higher speeds, so I'm considering 2 layers in few placesCan you tell a big difference in the road noise? Was it worth the effort? I would think that doing the roof would help with the noise control also.