I had a Stebro system installed on my 75 TR6 in July.  I asked Andre at 
Stebro about the twin muffler system, and he said that it really wasn't 
needed so I opted for a twin-tip single muffler system.  At first it 
did resonate quite a bit around 2800 on acceleration, but I found that 
as the system went through a break in period that this stopped.    Yes, 
the Stebro is louder than stock, but I can easily carry on 
conversations at all speeds.   The wind noise is louder when cruising . 
  I also love the sound quality.
Colin Traquair
Check out the new British Cars Forum:
http://www.team.net/the-local/tiki-view_forum.php?forumId=8
 
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