suspension geometry and steeda lowering spring

Lowering springs will help the car handle better but you will be at a loss for weight transfer (F/R weight transfer). By casting chambers, I assume you mean caster/camber plates, and it would probably be a good idea to score a new set of them since you don't know the quality or age of the others. New shocks are not necessary, but they do help out tremendously in the ride quality. You will also need to get a new front end alignment when you lower the car. The front tires tend to bow inward causing a very uneven tire wear pattern, and causes your tires to wear about 3 times as fast.

Joe

do i need a camber kit for my car? all i got is the eibach pro-kit

you dont NEED caster/camber kits but it is recommended when dropping your pony.