Will Mace's manifold insulator fit my Pontiac G8 V6?

The manifold insulators as shown in the links below will fit your Pontiac G8 V6:

COLD AIR INTAKE MANIFOLD INSULATOR ALLOYTEC VZ-VE

http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectID=1469404

25MM COLD AIR INTAKE MANIFOLD INSULATOR ALLOYTEC VZ-VE

https://www.maceengineering.com.au/epages/mace.sf/en_AU/?ObjectPath=/Shops/mace/Products/MI603/SubProducts/MI603