Last week did one side, and today, use some plastic board to do the other side. Found the intake should be slanted enough to be realistic, but there are some placeholders for the chassis which cannot be easily removed nor relocate. Tried to sand it as slant as possible...
Hopefully I can start puttying the front skirt this week and the intake and take some time chop off the center part of the bumper and replace it with some PE grille. After that the side intake can be prepared...