Im buying a 2004 honda civic SI hatcback. I was told that the ECM in the car restricts alot of things. i was told that a 100 shot of nitrios only gave it 10hp. I was told that intake, exhaust, headers and just minor stuff like that pretty much didnt do anything to the car, is this true? If it is what can i do to change it? Do i have to buy something like a hondata, a stand alone ECU, let me know what i can do, thank you
chris
chris
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