Hello,
you can change the pistons from a 3 hole to a 2 hole which will change how much pack the shocks have. Shock oil can be changed to make the shocks softer/ harder which will change the handling of the car like the roll and stuff and how it goes over bump. The ball cups can be changed to change the droop and stuff.
Ill let someone check my first so dont quote me on anything
Im still learning about stuff aswell.
Ben