[Mark IV]

The "S/C" is what the Superformance "MK III" replicates. The other SPF option is the "Roadster", which is the 1960s street car with undercar exhaust. The CSX car sold currently by Shelby is also an "S/C" clone.

What may be confusing is that Hi Tech Automotive who manufacture the Superformance product line also build the fiberglass CSX cars for Shelby and both are distributed by the same entity. There is no direct connection with either product other than manfacturer, distributor and that fact that Shelby licenses the Supeformance MK III product line. So they are brothers from different families.....Geez, now I'M confused!