~Reinforces and protects common failure points where trailing arms and subframe mount to body of E36 BMW 3-series. ~The set includes both trailing arm pocket and subframe mount plates, which are also available separately if you dont need both sets. The weld-in .125" laser cut steel reinforcements allow precise 3D scanned access to 47 OEM spot welds across multiple planes for the best connection and load distribution on the strengthened unibody chassis. Can be either welded in or attached with epoxy. Check the gallery for placement diagrams & install photos!