Kayaba - KYB Protection Kit - 910002 KYB-Kayaba Part Number = 910002 Kit Contains :- 2 x Bump Stops and 2 x Dust Covers KAYABA - KYB Protection Kit Reasons you need to change every time you replace shockers Prevents dust and moisture from damaging the piston surface and seal Protects piston rod from corrosion due to road pollution (dust, moisture, stones impact) Increases the life of the strut Avoids premature oil leakage from the shock absorber Limits the suspension travel in the compression phase which improves road handling Saves money by increasing the life of the shock absorber and coil spring No extra labour time if changing at the same time as the shock absorber When should Protection Kits be changed? Answer = Each time the shock absorbers are replaced. Using old Bump stops and dust covers can have a detrimental effect on the life of the shock absorber plus the old bump stops can have an ingress of dust and grit which could damage the piston and seals which is NOT covered by warranty. Your car your choice - If a job is worth doing it's worth doing right. Cross Reference Part Numbers :- OPTIMAL AK-735181 QUINTON HAZELL 300157 BOGE 891060 MAPCO 34826 MEYLE 100 740 0009 SACHS 900106 AUDI 1K0511353K AUDI 1K0513425