Squeaking When I Start The Car?

Could be a loose drive belt. They squeal when they slip. They are most likely to do this with a cold engine as everything will need a little more grunt to get going. If the noise does not happen with the engine warm I would lay money on this being the cause.

what mods do you have?

Yep I had this with my ST. Sqeaking when cold - lasted a minute or so. It was the auxiliary belt and just for measure they changed a tension pulley as well under warranty. That fixed it.