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Old 09-17-2008, 12:19 PM   #20
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Join Date: Jan 2006
Location: Cyprus
Posts: 6,606
My Ride: ESS TS2 320ci
Originally Posted by tonee View Post
So what was the initial purpose of the butterfly valves being closed? now that we're opening them permanantly, will it effect anything?
Also will it work on 320s?
Less noise during low rpm. The 320 doesn't have the flap
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