Use these high quality GT3 Lower control arm shims built from 6061 grade aluminum to adjust the camber on your Porsche. These shims can be used on all two piece front and rear lower control arms of any Porsche 996/997/981/718 GT3/GT3 CUP, GT4 or GT4 Clubsport or if your Porsche has upgraded to the GT3 lower control arms. They can also be used on 991 GT3 or CUP front 2 piece lower control arms. Priced and sold as individual shims. Please select thickness of shims needed when adding to cart. Note: Most camber adjustments will require a pair of shims.