Nope they sure dont but if you call them they will know exactly what your talking about, but beware you will have to modify the bracket slightly. I dont know if the beltech is a direct bolt on but if I had it to do all over again I would probably go that route to try to avoid the modification that was necessary with the SoCals.
Good luck trying to figure out which part number you need to order for the Belltech extenders. There was a thread about it here a few months ago and I am still confused. Summit Racing says 6652's are the correct number and Bell Tech says 6657's are correct. Maybe someone will reply who has more experience with them.