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      10-23-2012, 08:21 PM   #58
bdaddylo's Avatar

Drives: 2011 E82 1M
Join Date: Dec 2010
Location: Houston, TX

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Originally Posted by tunedone View Post
In terms of the exhaust note. I had the maddad mid pipe first and once I added the Dinan the sound became much deeper than the maddad alone. I don't think the video does the lower octaves justice. When I blip revs when the car is totally warm, there is a very serious exhaust note and people come up to me all the time an comment on how that has to be a serious exhaust system. Second, the stock exhaust muffler has an internal valve that from what I understand from Dinan is actuated by exhaust pressure. Higher revs would open the valve. There is no valve inside the Dinan muffler. The pipes were installed as high up as possible. The perception from me and the distributor for Dinan that installed it is that they want you to see the muffler to some degree for a sportier look.
Never heard of this internal valve and none of the pics I've seen of the internals show such a thing. I have to call BS on this one. Most exhaust valves operate on vacuum and not pressure.

1991 E30 M3/Brilliantrot
2011 1 Series M Coupe/VO/Fully Loaded/Bloated/Stoptech ST-40 Trophy Street