So I have no idea what could this be. It drives fine but sometimes it makes a hissing of metal sound. Like a small grinding of some type. I can hear it on the passenger side rear. Does anyone know what this could be?
rotors will always rust without use/braking. If you hear it when braking, you probably have rust buildup or something between the pad and the rotor surface. Could be a small stone
Nope. Just eibach springs. I was thinking it's my tires since it's balding out. But I'm rotate it to see what happens. My next opinion was the bearing?