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Illegal?

  #1  
Old 08-12-2008, 12:54 AM
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Join Date: Aug 2007
Location: Madison Wisconsin
Posts: 122
Default Illegal?

So I have heard that cat-back exhaust systems are illegal in some if not most areas. Why? Are they louder than most?
Also I know a lot of higher end mufflers like Magnaflow and Borla can claim hp gains but wouldn't there also be a drop in fuel economy? If just seams those two things have that correlation.
Any way I know Magnaflow has one.

http://www.magnaflow.com/02product/s...ll&id=3966

What do you think?
 

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