They don't have side louvers for the 4th gen, well except for some solid cover ones that look odd IMO. I wish they had slotted/normal ones!
For rear I absolutely love them, but be ready to have a dirty rear window all the time, they're really hard to clean. The original production ones had piano hinges so you can clean underneath. my friends dad is going to make some for me so ill let you know how it goes and if it works
My roush quarters are on their way!