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tandem oil pump
so, the 9x7 cars have a vacuum/oil tandem pump. apparently provides better vacuum for brake booster, resonance flapper, etc. from what i can see, 9x6 and 9x7 oil pumps are interchangeable (parts catalogs actually carry a 997 part number for 986 oil pumps).
so, question is - anyone swapped in a later pump on their car for better vacuum?
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