Vs IRS camber probs

Have installed Pedders camber correction kit recently and still has approx 3 degrees negative camber/toe. Still running on factory SS sports suspension and would like to lower the car a little more but can't because this will throw it out more. Any Ideas? Does anyone know if other brands offer more adjustment than Pedders kits do? Or any other products to help?

Front or rear of the car? I assume rear?

Have installed Pedders camber correction kit recently and still has approx 3 degrees negative camber/toe. Still running on factory SS sports suspension and would like to lower the car a little more but can't because this will throw it out more. Any Ideas? Does anyone know if other brands offer more adjustment than Pedders kits do? Or any other products to help?
Yeah mate rear.