Factory Five Racing, Inc. (FFR) is an American automobile company that designs and manufactures assembly kits

Kit car

A kit car, also known as a "component car", is an automobile that is available as a set of parts that a manufacturer sells and the buyer then either assembles into a car themselves, or retains a third party to do part or all of the work on their behalf...

 for replicars and sports car

Sports car

A sports car is a small, usually two seat, two door automobile designed for high speed driving and maneuverability....

s.
The "kit car

Kit car

A kit car, also known as a "component car", is an automobile that is available as a set of parts that a manufacturer sells and the buyer then either assembles into a car themselves, or retains a third party to do part or all of the work on their behalf...

s" manufactured by Factory Five are sold as components. They are not pre-assembled by Factory Five. They are intended to be assembled by the purchaser or by a third party.
The original FFR Roadster was based on the innovation of using running gear from a single modern donor vehicle, the high performance Mustang.