JDM HONDA REPLACEMENT ENGINE FOR DUMMIES

Can n e one tell me what kind of attain in hp i must b having? Also so i'v looked at acquiring a mugen air filter an box to but there v pricey, dose n e one particular no if its worthy of having just one an what get i'd get from it. Thanx AshtonIf you would like major power The natural way aspirated, you’re going to have to open up your engine up