Do you have heavy valve springs and a mild cam for Turbo V6 Series 2?

Assuming you have an ecotec or an L67 engine, then the parts that would be suitable are shown in the links below,

Valve Springs http://www.maceengineering.com.au/epages/shop.sf/en_AU?ObjectID=1469582

Please note that these require retainers to suit as shown in the link below http://www.maceengineering.com.au/epages/shop.sf/en_AU?ObjectID=1469377

Camshafts to suit turbo application http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/CAM609/SubProducts/CAM609

Please note that either the Stage 2 or Stage 3 cam would require valve stem seals to suit, due to the additional clearance they give between the retainer.

These seals are available in the link below http://www.maceengineering.com.au/epages/shop.sf/en_AU?ObjectID=1469378