What are you talking about mikey13, all us 240sx that came directly out of the factory came equipped w/ the ka24e or ka24de.....no ca18 or sr20.
Unless your are talking about the us 200sx the ser's came with a sr20de still not turboed.
But, not all ca18det and sr20det's are illegal, depending on smog regulations in your local area...which can be smog compliant if you take it to a properly govern'd auto specialist.
Unless, there is something little mikey knows....highly doubt it though. Always open to learn something new.....
