Cost about $145 after shipping. They? As in BBEngineer? You can see what he does by going to the site I linked above. He's a member of NAIOA and runs a side business making mods for various cars. Installing these overlays requires disassembling the cluster. He also de-soldered all my old LEDs which he had installed previously, and soldered new white LEDs. The overlay has a blue tint so it glows blue.