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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > where is the valve of the exhaust in 335i located at ?



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      10-01-2010, 11:15 PM   #1
FVM3
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where is the valve of the exhaust in 335i located at ?

where is the valve of the exhaust in 335i located at ? also when will it open and close? Sorry i dont really know much about this because i changed the exhaust
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      10-01-2010, 11:20 PM   #2
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Borrowed this picture:



You can see the actuator attached to the left side tailpipe (driver's side) in that image.
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      10-01-2010, 11:26 PM   #3
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Quote:
Originally Posted by NiVeDh View Post
Borrowed this picture:



You can see the actuator attached to the left side tailpipe (driver's side) in that image.
thx for the image, but when will it open and close?
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      10-01-2010, 11:58 PM   #4
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Quote:
Originally Posted by christopherchenm View Post
thx for the image, but when will it open and close?
It is rev-dependent. Low revs = closed. High revs = open for proper exhaust flow.
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      10-02-2010, 01:59 AM   #5
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Also, it's closed when the engine is cold. It only starts to open up when the engine warms up. It'll also open on idle or at low rpms. Just drive slowly through a parking garage to enjoy the pops and cracks from that left pipe!
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