Reply To: 2017 NSR Porsche 917 Rules discussion Home › Forums › Club Races › Racing Calendar, Classes & Regulations › 2017 NSR Porsche 917 Rules discussion › Reply To: 2017 NSR Porsche 917 Rules discussion April 2, 2017 at 7:11 PM #10622 AutoramaKeymaster Race Control wrote: Define irregular. Shawn, We will discuss this during April’s club meting.
