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Old 10-07-2012, 11:21 AM
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Orient330iNYC Orient330iNYC is offline
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Originally Posted by gotrice415 View Post
If you have an N54 back pressure is critical for waste gate/turbo operation since the flap is actuated in exhaust.
this is not accurate. i have the oem performance exhaust, installed at the vdc and there is no exhaust flap. there is a stub to terminate the vac line. the valve is for low rpm noise reduction.

the op has a different issue.
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