Never needed a CAI kit to produce 300bhp but you did need a supercharger ~ what's that cost £2-2500K?
Not trying to argue with you and that's a great mod's list for an EP3 for sure but not everybody wants to splurge that much cash and it's not always about how much bhp you can get.
My CTR was standard apart from a full stainless steel custom made exhaust system and the Gruppe M induction kit. It put a smile on my face every time I drove it though once I had the Gruppe M fitted as the sound it made during VTEC was incredible.
Performance wise I obviously didn't gain anything really especially without a remap (K100/KPro) but it made the car great fun for me to drive and only cost a total of £600 odd for the exhaust & induction kit. Peace.
I was going to say 300bhp without doing anything major would have been seriously impressive.