Metal Diff Oudrive Cups for increased durability. Fits all versions of the Blackzon Slyder and Slyder Turbo. Recommended upgrade when using the Steel Driveshafts: #540067 - Metal CVD Front Driveshafts (2pcs) #540068 - Metal Rear Dogbones (2pcs) Genuine BlackZon kit spare part for quick repairs, correct maintenance, and precise fitting.