A throw back to the International Race of Champions (IROC)
HSR in coordination with Jochen Mass is introducing the re-birth of the Porsche IROC series, HSR’s inter-series will be known as the Classic RS Cup.
Welcome to all competitors with existing race-prepared Porsche RS 2.7L through 3.0L race cars.  All championship eligible cars must compete with an approved safety system and stock make and model engine and transmission, with approved allowances for exhaust and intake modifications.  This inter-series will follow the HSR Standard Operating Procedures and Race Rules.
The Classic RS Cup will have at least one feature race at the following 2017 events: Sebring Spring Fling, 40th Anniversary of the Mitty, VIR Historic Races, Fall Historics, Savannah Speed Classic and Classic 12 Hour/Sebring Historics.