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PART NUMBERS:
99-04
05-07
Locking hub: # PPA-GF33
08
08 Diff cover-8C3Z-4033-A
You will need new bolts to fit them on an earlier model however, as the bolts on the stamped steel diff covers arent long enough.
Bolts stainless hex head 5/16 18, 1 1/4 inch long.