Talk:Stingray Evolution (v5.3.0)/@comment-98.206.36.33-20170531020324/@comment-29898480-20170531131407

R$ upgrades plus the first Drivetrain GC upgrade and the following Drivetrain R$ upgrade (11 upgrades total). This pattern allows you to win the mock drag race in 3.3, and everything else up to the next mock drag in 5.4. It is not enough to win 5.4, that requires a skip, which is cheaper than further upgrades. The event can then be completed with 11 upgrades. This is the cheapest path to win the car.

This information all gleaned from the prior event forum discussion.