The document proposes using two manipulators to make an exhaust assembly production line more efficient. Manipulator #1 would transfer assemblies between the first station and second station, requiring 90 degree tilt. It would then travel to the last station to transfer assemblies between the gaging station and rack, requiring 90 degree tilt and 180 degree rotation. Manipulator #2 would be double-ended and used only to horizontally transfer assemblies between the second, third, and fourth stations simultaneously.