B8 5125 / B8 5150 / B8 5160 / B8 5165 / M 7100 Series / B8 8125 / M 9100 Series / M 9300 Series / BILSTEIN Clubsport® / MOTORSPORTS PRODUCT. Series: B8 5125. Bilstein B8 5125 shock absorbers are designed to be used on custom vehicles in order to achieve the desired ride.