CMS Performance shims are used on FRONT and REAR of all 986/987/996/997 fitted with two-piece lower control arms
(commonly referred to as "GT3" control arms) and ONLY FRONT of 991s with two-piece lower control arms.
CMS Alignment Camber Shims for Porsche Two-Piece LCA
These shims are used to adjust camber by changing lower control arm (LCA) length. Thickness in mm is clearly marked on each shim for easy sorting.
One degree of negative camber = about 10mm of shims.
Available in the following sizes:
These fit all two-piece Porsche lower control arms (except 991 GT3/GT3RS rear, which use a different shim shape).