I would like to purchase one of Mace's tunes for my VY Calais supercharged V6. I would like to acheive an improvement in throttle response, more power and an improvement in fuel economy. currently avg (13.5l/ 100 km) city driving, I currently have , - 10

Given your list of mods and requirements, value for money, we would recommend one of our mail-order tunes as shown in the link below:

http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/MEM613/SubProducts/MEM613

You could get a custom tune done which would be ideal, however, it wouldn't represent the same value for money as the suggested mail-order tune given your list of mods and requirements.