What could cause a creaking sound in the front end when turning right?

2004 Mustang Cobra Convertible

Seems to only happen when I turn the wheels to the right (passenger side), it makes a sound, almost sounds like a suspension creaking sound. Obviously it could just be a problem with the spring, right?

Additional info, whoever owned it before me had it lowered but i'm not sure how they did it yet, I haven't gotten under the car yet to check it. I want to get a whole new suspension set (shocks/struts and springs all around) Just need a list of info to check on it as well as any maintanence I should do while there!
Thanks so much!