2019 IPC chassis system proposal

Manufacturer tier | Stat degradation | Upgrades            | Aero/Engine/Chassis RNG | Consistency RNG
1st-4th           | -3 year on year  | 1 large or 3 small  | 60-75                   | 5-15
5th-8th           | -5 year on year  | 2 large or 7 small  | 50-65                   | 10-20
9th-12th          | -7 year on year  | 3 large or 10 small | 40-55                   | 15-25
13th-16th         | -9 year on year  | 4 large or 13 small | 30-45                   | 20-30

Large upgrades will be provide between 5-20 to the chosen stat, Small upgrades will provide between 1-7 to the chosen stat.