Do i need a flash pro with a aftemarket intake on 06 si?

Soi got my 06 si civic 1 month ago and my first aftemarket part were some skunk2 coils. I want go get more hp outta the k series but im still kinda new to this honda scene. Im looking up stuff and i wanna get a downpipe first than a short rem intake an probly a cat or exle back Do i need a flash pro? Since the intake may be suckin more air to the manifold and forcin more gas into the motor. I heard that it will make the stock ecu go crazy or sum **** lol Thats my biggest question im kinda new to all this tuning stuff so bare with me. Should i get the car tuned after all of this?

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