is this part interchangeable??
 

The air intake and indicator interchangeable with the brz??
http://www.flickr.com/photos/moto_club4ag/7007266074/
Not worried that the brz doesn't have indicator Inc led
http://www.ft86club.com/forums/attac...3&d=1330900213

It looks like a different shape to me. If you want to interchange them, you'd probably need to change the entire front bumper.

No, they aren't.

It depends.

The side marker lamps in the fender fore of the wheel well is interchangable, and headlight assembly is interchangable (though this will require a complete rewiring of the assembly, and addition of an aftermarket ballast if you are opting for the Subaru or Toyota HID lamp grid, or a complete circuit replacement with HID equipped cars which is a bit more involved.) The Subaru BRZ headlight seems to cut off at the nose end but it is only being covered by the BRZ's bumper and the assembly beneath it has the same shape as the FRS/86.

The air intake, if you mean the front grill, is specific to each car, and cannot be swapped on its own, but entire front bumper skin can be interchanged with BRZ/FRS/86. Again this may require re-wiring of any markers or lamps on the bumper as they are located in different parts of the bumper location.