ZR6-2014

Well I traded in my 2010 SX6 for a 2014 ZR6 just before Xmas and I understand what you mean. The 2014 ZR6 has excessive road noise. I swapped tyres / wheel with my wife's Aurion Presara running Pirelli tyres and it made no difference. Extremely frustrating. Overall it's a great car and it handles brilliantly. Does anyone know where I can get sound deadening done inside the car in Brisbane? Open to suggestions.