the tune that im running is not somthing that is going to screw your engine, the AFR was only set to where it should be, the car dosent run lean enough for any issues to arise. exhaust is up to you, so far there is only one system that has proven itself on the forums both power and noise wise and most of the more modified cars are all running it, do a search for CES Exhaust and there is loads of info about. The Apexera Power FC is not a piggy back like an emanage or unichip its a full replacement ECU, the unit is not plug and play so if you decide to go ahead and do it there is a workshop in Sydney that has done 2 cars now, the 2nd car has not suffered the issues that i have so i must be the lucky one.