I have a sct tuner I bought for my gt500. Still have it but sold the gt500. Can it be used for your tunes? Its the x3. If so, how much would it be for the tune? Do you update as parts are added? Starting with a cat back and intake but ic and downpipe catless soon (got to find one I like ). Everyone swears byvyou on here so I figured I would hit you up. Running cobb right now but would like to try yours.