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      11-15-2013, 01:11 AM   #45
Asbjorn
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Quote:
Originally Posted by VailM3 View Post
Any videos of the sound?
Both OP and I posted videos of the sound in this thread.

I do not think you will need the "gold tree" mod or 35is mufflers if you delete the secondary cats. The flap helps to dampen the exhaust when just cruising, and if you are like me, you will want that after the secondary cat delete. There is a reason BMW installed it in the first place.
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      02-09-2014, 09:35 PM   #46
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Another sound clip from driving in a tunnel with one window open

http://v.youku.com/v_show/id_XNjcxMTY3NzEy.html

The up-shifts sound like small explosions haha
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