[PNJSNAK]

Yes, stronger springs, spring spacers, the rear mounting of the lower shocks have multiple height positions.
Can you describe what you mean by " bottoming out"?
The solid aluminum 4 link bars on the rear if you have them have a tendency to have the rear end angle up a bit causing it to hit the frame cross member.
At least on mine and a few others.
I put on adjustable bars and tilted the nose of the rear end down a bit, no more hitting the frame crossmember.
Take a few pics of your suspension areas and of the car showing the ride height and you should get many responses.
Also, if you have questions on the MFG car Joe T at A & C he is usually very helpful, as well as the guys in this forum