if the engine came out of a car that is the same year or newer than your car, its usdm, it has all of the emissions equipment out of the donor car and is not a stolen engine then you will have zero problems getting it BAR'd. if its a jdm engine that has a usdm counterpart, you can still BAR it but you have to take extra lengths to get it taken care of. if the engine was never introduced into the usdm market, no way in hell are you getting it bar'd unless you change the engine stamp and that is SUPER ILLEGAL