your question is vague, do you mean what tools do you need or what parts do you need for your car to be lowered?
coilovers
14mm socket
17mm socket (x2)
jack and jackstands
allen keys
mallet
spring compressor or something that will do the same thing as a spring compressor (shoe string, t shirt, belt etc [not advised to use these so use these at your own risk cause im not liable for you being a retard and killing someone shooting off your spring])