GETTING MY B16B TYPE R TO WORK

Can n e a person convey to me which kind of attain in hp i should really b getting? Also so i'v checked out acquiring a mugen air filter an box to but there v expensive, dose n e just one no if its worthy of finding just one an what get I would get from it. Thanx AshtonThe Honda B-Series engine not just introduced a dual overhead cam valvetrain tow