1 or 2 pieces for next season In my way to win WMC, I am pushing part imporving as much as I can, as a result I spent most of the year building and improving high risk parts for the next season. However it is not clear to me the advantages of focusing this resources into creating 1 really good component of each, or creating 2 of each.

What is a better strategy?

Or put in other words: Is the base performance of next year parts calculated from the best part of this season, or the average of my 2 best parts?

Bonus question: Do performance of pieces affect my next seasons chassis, if yes, how exactly?