Weld-in .125" laser cut steel plates with 3D scanned OEM spot weld connections for E36 BMW. These plates reinforce both horizontal and vertical surfaces around the trailing arm pockets to repair and/or prevent cracking of the chassis. Left and right sides are included. We recommend installing the SubFrame Chassis Reinforcements at the same time, sold separately. These are already included in part # E36CR_SET. Check the gallery for install photos!