Ultra-light, ultra-strong top clamp for bulkheads with adjustment roll-center roles, CNC-machined from premium Swiss 7075 T6 aluminum, orange color. Roll-center jobs offer a great variety of alterations for both front and straight back suspension system system roll facilities. Bulkhead cavities allow 3 various mounting roll-center roles along side roll-center height by adding/removing shims beneath the ball joint. The clamp height is reduced by 2mm compared to the past platform, which adds additional freedom for roll center changes. For T4 only one time the roll-center positions was indeed developed to be properly used with new T4 bulkheads that are 6mm relocated toward framework center compare to T3.