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Up for grabs--two different styles of LSD. One is a Fuji-type for an 03 purchased on this forum but never used, and one is an RX-7 OEM clutch-type LSD. I've only used the clutch-type LSD for 3-4,000 miles, and it felt like it was ready for new clutch plates. These are available from Mazda, or you may find that you don't need them. I don't know, and didn't investigate.
$250 each, free shipping
RX7 clugth type. Looks new in person. Bell-spring steel clutch plate steel clutch plate Torsen on the left, RX-7 on the right moar... RX7 RX7 RX7
If anyone feels like skipping the rebuild you can do a coke-can shim in the clutch diff, I've had positive results with mine (even after a full rebuild it wasn't quite tight enough)