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depends. if you are keeping your ac then you just delete the pump altogether and run a shorter belt. if your ac is gone then you need some sort of dummy pulley there. GSR make one that mount in place of the ps pump. porsche make one that mounts in place of the ac pump (for the cayman r when it came out, but the ac pumps are the same throughout model years so should fit); both are about the same cost. GSR, before they made the dummy pulley, were just using a gutted ps pump and apparently no issues, so i assume a dry bearing.
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