I can't say for certain if these were dealer installed or not. There are a lot of these Arvin heaters around, some have studs that mount them and others, like mine that have threaded sleeves around the core outlets to mount it. The other styles of heaters I've seen have been Mopar branded. There is one similar to the Arvin but more square and the one like Nick has in his firewall pic. The one in Nicks picture is the same style used for the dual heater set up which intended for colder climates or the larger cars.