| They also have this listing, which is actually what prompted me to contact them originally after discovering the part number and size differences between the current and Z1 supplied bearings... https://www.z1motorsports.com/clutch-and-flywheel/koyo/300zx-koyo-throw-out-bearing-p-5191.html?list_name=NestedCategoryTransmission%2FDriveline&oid=5191%3A0%3A408%3A1&qid=03b12894b0af9ad9a0be114f8a790c58 This listing includes a photo of the part number (RCT40SA3) which is what is/was installed in my Z and they list as OEM. So there is obviously something different with their clutch kits for them to feel the need to "upgrade" to a different size bearing. Anyone know what it is?
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