Thread: It arrived!
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      10-20-2011, 12:00 AM   #126
Dukat
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Drives: 2012 X3 35i
Join Date: Aug 2011
Location: NJ

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Quote:
Originally Posted by colson79 View Post
I found the thread with the schematic.

http://x3.xbimmers.com/forums/showth...hlight=exhaust
That's exactly the post I was thinking of. Good find, thanks!

Lotus's response explains the loud 20 seconds on the 35i start:
The "throaty", louder system is delivered on 35i models only. It uses a "Dual-Path" muffler that uses a quieter path through the muffler for light load cruising and a direct "straight-through" path during start up, at large throttle openings, and during turbo boosted operation. A electronically controlled vacuum actuator switches the muffler path.
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