SPO is designed for cars which exceed the preparation limitations of the applicable SCCA Production or GT Category Rules but which meet the safety requirements for GT category cars. It’s said the first rule of SPO is “There are no rules” while the second rule is, “If in doubt, refer to rule #1.” Fast, fun, and wild, the ultimate SPO car would probably be an unrestricted version of the factory Corvette C7-R, but GM is not interested in running with us yet.
Full ruleset GCR search phrase – “Super Production”