I have pontiac G8 V6 (LY7) I want do tune for it with ghost cam sound can Mace do it for me and how much will cost?

While we can supply a tune to suit your Pontiac G8 LY7, we do not offer the Ghost Cam feature like what we do for the LLT at this point in time. In regards to pricing, please refer to the link below:

http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/PPF601/SubProducts/PPF605