So, Siren is a custom I made, using Titans Return LoudmouthTR OverboardTR Autobot Breakaway, Reprolabels’ Siren conversion set, and a lightbar and chest piece from Shapeways.

Nightbeat is also a custom, using T30 NightbeatTitans Return Nightbeat, and a neck adapterchest piece, and two guns (not pictured) from Shapeways.

If I do a Goshooter with the alternate parts of the Reprolabels set, I’d have to call the remaining vehicle the “Kopf Car”. 8^)