Talk:Pro Kits/@comment-68.133.38.15-20151016194322/@comment-68.133.38.15-20151017021149

They've also been tinkring with the probability of what cards show up. In a year, I received 1 v10 engine. In one super racer kit box, I received 3 v10 engines. It probably has something to do with the R&D event.