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