Yeah, anyways.
Basic rule of thumb for these upgrades:
Weaker type of car: N2O considering most of these types of cars are small and lightweight ones.
Suspension: if it's a reasonably weighed car, but with a bit of steering difficulties.
Weight Reduction: for really heavy cars like SUVs or Pontiac G35s (Or Infinite have to check on that)
Status = Part Time. [b][color=red][size=12]I am the car expert! So I've been told. lol[/b]
Check it out