Is it bad......? - Page 3 - MustangForums.com

4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Is it bad......?

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Old 06-24-2009, 01:04 AM
  #21  
gif4445
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Originally Posted by H0SS302 View Post
Running without mufflers is no different than using a straight through muffler.. instead a straight through muffler just ipens up to 3" instead of staying 2 1/4" like the stock diameter piping.
Making for better/deeper sound?
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Old 06-24-2009, 01:07 AM
  #22  
mustangman281
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Your engine does not need back pressure. The reason people think they lose power from losing back pressure is because they open their exhaust with stock cams and stock tune. Less back pressure requires more overlap in the cams (unless your supercharged) and a re tune to get the a/f correct.
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Old 06-24-2009, 03:07 AM
  #23  
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Its really going to make those late night runs to the store hard
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