The RSX-S is a much more potent engine than the B series. Most of the turbocharged GSR engines I tune make 300-350whp on stock internals and pump gas. The K series turbo cars I have tune have made 370-460 on pump gas and stock internals. Thats with a very conservative tune. The only things I dont like about the RSX-S is the transmission and the front suspension which flexes a lot under power. The transmission is pretty weak. Weve sheared off a few gears on the street.