All struts are made of structural steel, which ensures adequate strength and stiffness. Each strut is powder coated in black mat, under the paint there is a zinc primer to prevent corrosion Dedicated to: BMW E46 - all versions Main advantages and reasons for using struts: body stiffening better cornering recommended for sports suspension improves driving comfort prevents cracking windshield recommended in every older car All struts are made of structural steel, which ensures adequate strength and stiffness. Each strut is powder coated in black mat, under the paint there is a zinc primer to prevent corrosion Dedicated to: BMW E46 - all versions Main advantages and reasons for using struts: body stiffening better cornering recommended for sports suspension improves driving comfort prevents cracking windshield recommended on any older car