These are some products which can increase the power gains. Links are given below:
COLD AIR INTAKE TO SUIT HOLDEN VZ V6 http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/CAI609/SubProducts/CAI609
COLD AIR INTAKE MANIFOLD INSULATOR ALLOYTEC VZ-VE http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/MI603
25MM COLD AIR INTAKE MANIFOLD INSULATOR ALLOYTEC VZ-VE http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/MI631
VZ-VE ALLOYTEC & LLT SIDI V6 BALANCERS http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/PB620/SubProducts/PB621
MACE RECALIBRATED ECM TO SUIT VZ-VE ALLOYTECS, CAPTIVA & RODEO ENGINES http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/COMP621
HOLDEN VZ-VE ALLOYTEC V6 CAM PACKAGE (Custom tune required) http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/CAM616
HOLDEN V6 ALLOYTEC MANIFOLD http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/IM609/SubProducts/IM609
Beyond this, you could consider getting the cylinder heads ported, and the engine built such it's able to revved harder (reliably increase rev limit). The later would be handy if you wanted to run even larger cams then the ones we currently have off the shelf.
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