Engine Codes

For mods that will increase airflow by marginal amounts you probably won't need a tune. Or if you do get one it will be for "optimizing" rather than because the car is running badly.

For most driving conditions fueling is closed-loop (using feedback from the oxygen sensors) and so the system will automatically adjust. For WOT the MAF sensor is telling the ECM how much air is entering the engine and the injector pulse will be computed correctly.

If you do some minor mods and top it all off with a proper dyno tune I don't think you'll be disappointed but don't expect big gains.