Ultra-light, ultra-strong upper clamp for bulkheads with adjustment roll-center positions, CNC-machined from premium Swiss 7075 T6 aluminum, orange color. Roll-center positions provide a great range of adjustments for both front and rear suspension roll centers. Bulkhead cavities permit 3 different mounting roll-center positions as well as roll-center height by adding/removing shims under the ball joint. The clamp height has been reduced by 2mm compared to the previous platform, which adds additional flexibility for roll center adjustments. For T4 only as the roll-center positions were designed to be used with new T4 bulkheads which are 6mm moved toward chassis center compare to T3.