Is possible to convert my single jet(K15B) engine to dual jet(K15C) engine? Is possible to convert just replacing the dual jet fuel injector into single jet(K15B) engine?
You can replace but can not add injectors. I have an s-cross with k15b and have test-driven new Brezza with k15c. The K15C is very bad than the K15B in terms of Performance even with 2 NM torque less it feels like 20NM Torque less