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The 02M diff shaft is bigger diameter than the O2A, so I don't think you can use O2M cups. For what it's worth, I used bog standard GKN replacements from GSF / EuroCarParts on my VR6 Turbo years ago and they're still going strong. But if you want mega strong, here are a couple of options: Best and strongest shafts / CVs - http://www.driveshaftshop.com/import-axles/volkswagen GKN do uprated shafts and joints too - http://www.gknservice.com/global/motorsport/cv_shafts_joints.html