NOT KNOWN FACTS ABOUT B16B TYPE R ENGINE FOR SALE

Can n e a person explain to me what kind of attain in hp i really should b acquiring? Also so i'v checked out obtaining a mugen air filter an box to but there v expensive, dose n e 1 no if its value obtaining just one an what gain i'd get from it. Thanx AshtonB18 engines are more expensive than B16, probably due to their level of popularity Among t