As "ctr1108" stated, once a car has reaches a certain mielage, it is either taken off the road or a completely new engine is swapped in its place. We Americans like to call these engines "JDM" engines. Most of these are b-series. (I would hope to believe is true) If you are looking for more horsepower and more aftermarket capatable parts the "b18" is your best bet. The 'b18c' however will cost a little more than the 'b18b' due to it being a VTECH engine.