When installing the 12MM COLD AIR INTAKE MANIFOLD INSULATOR TO SUIT ALLOYTEC VZ-VE 3.6L V6, should I also buy new manifold gaskets? What would you recommend?

We would recommend installing the manifold insulator kit using our supplied silicone sealant, without any gaskets. To give you an idea as to the installation process, please refer to the fitting instructions below:

http://www.maceengineering.com.au/WebRoot/ecshared01/Shops/mace/4E1D/8C2F/7D5F/672B/E9DD/C0A8/D240/2EA6/ALLOYTEC_MI_INSTALLATION_.pdf