AS2 Series - Suspension Shock AbsorberBilstein AS2 Series shock absorbers are designed for motorsports applications and provide the user with the option to rebuild them. The modular aluminum design is offered in non , single and double adjustable configurations which provide superior on vehicle tuning capabilities. The threaded body provides precise height adjustments for coilover setups and dissipates heat quickly. The hard anodized coating reduces internal friction and improves strength