Talk:McLAREN F1 GTR/@comment-46.233.23.75-20170224212650/@comment-27006644-20170302205951

the GSV, you can use it in 2 series and R$ upgrades only will have it complete 12Cyl Slam in Elite, 71 gold for 100% in that.

100% Completion Strategy (or Return on Investment Chart)

But if your goal is to have a 100% garage then you'll have to go for both.