OE front bushing is the same design as control arm bushings. Polyurethane uses the outside shell of the OE rubber.
OE and polyurethane uses the same two metal pieces to locate and clamp them in place.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)