listen, ive built several focus and currently have a 13 sec blown svt. you're using ricer math plain and simple.
each component will compliment one another but WILL NOT stack horse power numbers.
just because an intake saw say 10 hp on a stock tune does not mean it will show that once a performance tune is also added. it may show a hp increase or it may show a decrease, or it may show no gain at all.
And each car reacts slightly differently to parts. no two engines are perfectly the same and the factory occasionally changes ecu programming slightly.
now, go run off to a honda forum and use your ricer math...