they are cheaper, but the B18B has a hell of a lot more torque. Going to a B16A from a B18B would be a very noticeable difference at any rpm under 5k or so. I have seen a stock B18B from jarco make 140whp (with just I/H/E). A stock B16A wouldn't make that much more (maybe 150whp or so without a tune)Originally Posted by TheProfiteer