THE BEST SIDE OF B16B TYPE R ENGINE FOR SALE

Can n e one inform me which kind of gain in hp i ought to b obtaining? Also so i'v checked out getting a mugen air filter an box to but there v pricey, dose n e one particular no if its truly worth having one an what get i'd get from it. Thanx AshtonThe Honda B16 engine has cemented by itself in the JDM aftermarket scene as One of the more modifiab