Talk:Supercars Championship '17/@comment-124.122.16.181-20170930234440/@comment-26829117-20171001210122

RR3 Wiki:Upgrades Strategy For 100% Completion

You need to upgrade both the Ford Falcon FG X (2017) and HOLDEN Commodore VF (2017) to the same PR to complete their bonus series so you effectively get this one for free.