lightly Sliding Sideways

[my dreamt dsm]

...Wait, save the search lecture, I typed in lowering 2g and came up with nothing answering my question.
Im posting in here because I guest i cant post in sus tech. yet. My question is why does the back of the car slightly slide sideways when you go over a bump on a drop 2g. It's dropped two inch with stock 16 inch w/ camber kit. Every little crack I hit on the road, my back makes a slight sideways motion. Do I need to reinforce or buy aftermarket sway bars.
Is it because of the wish bone suspension

 

[kahl23]

Have you checked your alignment?

 

[my dreamt dsm]

my alignment is fine bro! it's not just my 2g, it's also a problem in two of my buddies 2g spyder turbo as well

 

[stevo911]

Even tho a rare wheel alignment would solve it, When you lower car you take weight off of factory sway bars so they have less travel time. If the car has the orginal sway bars which are use to plenty of leverage before they spring and you put a lower kit in you have to use fresh sway bars that were not flexed from orginal suspension.

 

[blackGSX2g]

Check out your rear suspension bushings, most notably where the spindle meets the upper A-arm.