Good morning RJkennedy, you need to be quite sure what you ask for, custom tunes are VERY different to generic tunes.. Custom tune is tuning the vehicles modifications to that vehicle, making sure all the fuel trims & Wot mixtures are correct, boost levels are within the vehicle & engine capability's.. Generic tunes are just that Generic. you will have to make sure that boost levels, fuel mixtures & trims are correct for your vehicle.. Im sure Herrod's will correct me if im wrong, the workshop that you had contacted for a quote $990 inc 2 CUSTOM tunes dosn't have the SCT software to tune these vehicles so how can they do a so called CUSTOM TUNE!!! Regards Kit