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 i'm still kinda new to this honda scene. I'm 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 i'm kinda new to all this tuning stuff so bare with me. Should i get the car tuned after all of this?

Your intake won't make squat difference to how the engine performs, with or without changes to the ECU. Actual dyno testing on some of them gave looses of a couple of HP. OK the engine sounded more powerful as there was more induction noise, but that's all.

Now there are ways to get more power out of an engine, but the things you are talking about aren't them, they are mostly just cosmetic bling.