Originally Posted by gs_r_
what does the ecu do and how much hp gain do you get from it
I think you mean EM (engine manigment system) or a perfomance chip. Thats the only way to up grade you ECU. EMs are for changeing shift points, acceleration & top speed, amount of fuel usage & your cars timing. Sometimes the amount of boost you are running to. I suggest you learn every thing you can before buying one though. Hondata EMs might be your best choice.