Won't work. A simple look on KAAZ website would have told you this. The housings are shaped different, the ring n pinion is different, the axle stubs are different....
OEM part numbers
38421-12S00 = USDM S13 diff assy-open
38420-2C500 = Z34 diff assy-viscous M/T
KAAZ part numbers
SAN2655 = S13
SAN3510 = Z34
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