Blox Racing Street Series II Coilovers are CNC machined from SAE 9254 Spring steel and heat treated for durability. They then undergo powder coating for rust resistance. The twin tube design with fixed shock damping ensures sufficient stroke while maintaining comfort. The adjustable threaded spring perches allow for customizable ride heights, offering a unique driving experience. In addition to improved handling and ride comfort, the coilovers last a lifetime through harsh weather conditions and drive sessions.