The A-pillar covers go in after the dash pad, but if you have a new dash pad, it's probably puffier than the original one, so you're going to have to sand down the inside curve of the molding so it fits over the pad. You also have to gently twist it on as you try to install it, and lastly, be careful when you put the screws into the molding. Screw heads that are too big or tapered (like on a flat head or oval head screw) can crack the molding. Cuidado!