What kind of ECU into your '05 Lancer ES?? An Evo ECU? If so, there is no reason to do that. And not to be rude, but it isnt going to add to the performance of your car.
Rookhoe is way right! If you want some power for your 05 es start looking into a turbo build or even a 2.4l build with a evo head and turbo setup! It can be done!
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