KF3 Front Strut Tower Bar for BMW E36 Z3 Aluminum Strenghten Bar 1.Bar Material: AL 6061 T6,6063 T6 Aluminum Alloyed, good mechanical property with light weight. 2.Bottom Material: AL 6061 T6,6063 T6 Aluminum Alloyed, stamping to shape. 3.Bar Body: forging to shape. Good mechanical property. 4.Connect with special screw, good mechanical property with good-looking shape. 5.High luminance and polishing Finishing. We are leading the way in Polishing technique line.