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stevie 77 930 stevie 77 930 is online now
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Join Date: Jan 2008
Location: Chatsworth, CA
Posts: 513
Garage
What have " circled" is the control valve and what you " X" is the diverter valve. You are correct, not needed if you are not using the air injection system.

In case you want to know what these do:
The control valve is boost activated and measures a certain amount of pressure and then sends that pressure to the diverter valve, opening the diverter valve to divert air away from air injection system during boost conditions.
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1974 914
2018 GTS (on order)
2017 BMW 340I M Sport Package
1977 930 (recently sold)
1976 911S , 1973 1/2 911T, 1972 911E (long gone)
Old 08-21-2017, 08:09 AM
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