Splinter D-Class Into Four New Classes

In other words, bring back E-Class and F-Class as well as introduce G-Class. D-Class would still be 400 to 500. E-Class would be 300 to 400. F-Class would be 200 to 300. G-Class would be 100 to 200.

Edit: In addition to the paragraph above, I would also like to purpose the addition of H-Class, which would be for all cars currently at a PI level of 100, but are actually likely lower than that.