://:0/assets/autos_db/thumbnails/PB-Cup_jpg_677x1000_q100.jpgSpec MX-5 Challenge has announced that owners of NC generation Mazda MX-5 Cup cars (sometimes known as "Playboy Cup cars") are eligible to run in the Challenge series. Tom Martin, director of the Spec MX-5 Challenge said "Mazda estimates that about 100 of NC generation...