I have the DCAI from Needswings and before I did this I got the ECU tune from Eurocharged. After the DCAI install and some exhaust work I went back to Eurocharged and I was told that I would only need to get retuned after mods such as a throttle body upgrade or larger fuel injectors. So basically you can get the ECU tune done at anytime, it doesn't matter unless you mess with the throttle body or fuel injectors. I hope this helps.