Drop looks low for C springs, did you cut any coils? Have you replaced your stock shocks/struts yet? You're stockers won't like the drop + increase in spring rate for long
Oh and you might not "need" CC plates to get back into spec, but they wouldn't hurt! Plus with the adjustability they add you can dial in some more caster for better steering response and negative camber for more grip in the turns. And soild mounting most any steering component is usually a good thing imo.