I have a buddy that has a 2011 Buick Lacrosse with a 2.4 Cal emissions engine that needs to be replaced. Now Cal emission engines are few and far between up here in the Midwest.

So my question is can he swap in a Federal emissions engine? Do I need to snag a federal base file and change it to his VIN?

I'm more on the diesel side of this stuff, so any input is appreciated.