WHAT DOES HONDA B16B ENGINE FOR SALE MEAN?

Can n e a single convey to me what sort of get in hp i should really b acquiring? Also so i'v checked out acquiring a mugen air filter an box to but there v expensive, dose n e a single no if its worthy of getting a person an what acquire I might get from it. Thanx AshtonBut for those who chose earlier B16 models, It will be a lopsided showdown amo