Well, I was messing around under the hood and "unplugged" the sound induction tube on my 2010 GT. I was reading that the tube is plugged with insulation so I wanted to see if I could remove it. The insulation plug is just inside the tube at the firewall. I simply pulled the tube out of the firewall and removed a 1 1/2 plug of foam insulation. Also, there is a small caplike plug on the inside of the car just behind the clutch pedal that needs to be removed. It looks like a small white/gray flat cap. It simply pulls out. The car sounds much louder now and the cabin growl is significantly more pronounced. Nice free sound enhancing mod!