JDM HONDA REPLACEMENT ENGINE FOR DUMMIES

Can n e 1 notify me what kind of get in hp i should really b getting? Also so i'v looked at getting a mugen air filter an box to but there v expensive, dose n e 1 no if its well worth getting just one an what obtain I would get from it. Thanx AshtonThe B-Series engines became quite possibly the most coveted Honda engines because of their trustworth