TFS has TrickFlow on the front of the heads as ID89GT has said, and the only way they wud look stock is if they were painted, but you shud still be able to see the TrickFlow name threw the paint.
ya my tfs heads don't have anything on the front but there is a part number on the side of the head over the exhaust in the middle. you may need a little mirror to see it. write the number down and call trick flow they will tell you what it is exactly. but if I were you, just bring a magnet and make sure they are aluminum.