Hello
I would like to know how to lower the Abarth 595 class to class F because yesterday playing multiplayer I saw someone playing the 595 abovementity in the F-99 class and I managed to achieve the E-100?
While most upgrades improve your stats there are a few than can reduce your overall PI rating.
Wheels - look for the heaviest options to add weight, then if there are wheel size options go for the largest wheels again adding weight.
Aero - check front and rear spoilers as these sometimes reduce your overall rating.
Oil Cooling / Intercooler in Engine upgrades - these give a boost to HP, but add weight and in some circumstances results in an overall negative to your PI.
Differential - in FH1 as far as the stats screen is concerned this only adds a small amount of weight, so seen as a negative to your PI score.
Roll cage - can be positive or negative depending on the car, but here the weight gain on a car with little power to begin with, probably a negative.