THE BEST SIDE OF B16B TYPE R

Can n e one inform me which kind of attain in hp i need to b finding? Also so i'v checked out obtaining a mugen air filter an box to but there v expensive, dose n e one particular no if its worthy of receiving a person an what attain i'd get from it. Thanx AshtonB18 engines are dearer than B16, maybe due to their acceptance among the vehicle Group,