The early days – 348 Challenge Hans Hugenholtz and his 348 Challenge in 1994 Posted on January 4, 2021 by challenger24 Chassisnumber 84908, delivered april 1990, original Dutch registration YJ-51-NF and now owned by Paulus Hollander. Hope we see the 348 Challenge with his new owner and Hans at our Challenge and GT Days in June at the Red Bull Ring.