I have the C 15 550 hp in the Pete, and there is no comparison with the old 06 B, better, smother power, way more flexible power band, pulles down to 1100 rpm, and most important of all, gets way better mileage. The C 15 has a much better torque range for low rpm service, so your cruising at a much lower rpm, with the same results and responses. I am real happy with it.
Gord.