I'll a 2011 snorkel fit a 2012?

 

I do not believe a 2011 snorkel will fit the 2012 due to the location being different.

 

And I think of the engine size too

 

Some snorkel kits should fit without an issue. The air box was not relocated so if the new intake mounts to the lower air box (modified) than it should work. The upper part of the box was redesigned as was one of the tabs used to clamp the box down. Our design will need a new aluminum air tube for the 2012 JK's...

With that said it is best that you call each manufacture to confirm that it works before you purchase the snorkel.