This simple resource allows you to add sirens to custom vehicle models that happen not to be in the "Emergency" category. The reason I say custom is because it'll likely be a police vehicle mod that you want to replace a regular civilian car with. If your model has the sirens visually, it will now be able to function like real sirens if you use this resource and define it.

I am lazy to let multiple vehicle ID's work with specific siren shell position coordinates, you can duplicate the rows or wait till i update it, or make sure your model's sirens are positioned at the 'generic' location.