Abstract: A system for manufacturing metal matrix composites, each including a porous preform infiltrated with molten metal, includes a programmable, automated arrangement for handling preforms for sequential introduction into a die caster of the system. A preform loader includes a reciprocable loading head which receives each preform from an associated stack, and delivers each preform to a horizontally reciprocable carrier of a preform shuttle. The preform shuttle effects indexed movement of each preform along a substantially horizontal path, through a preheating furnace, and into the die caster. Efficient operation of the system is promoted, while undesirable damage to the relatively brittle porous preforms is avoided.