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new exhaust..

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Old Jun 7, 2008 | 10:42 AM
  #1  
beforeiforget761's Avatar
beforeiforget761
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new exhaust..

Went out yesterday and got a new cat-back exhaust kit.

Flowmaster 40 series, Single pipe, 3'' from the cat back.

It sounds pretty good.. A little bit louder than I wanted.


But, I don't understand how this helps at all with gas mileage at all.. I've got a pretty big case of lead foot wanting to listen to it!!
 
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Old Jun 7, 2008 | 11:53 AM
  #2  
Twinsdad98's Avatar
Twinsdad98
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From: Michigan
it won't help. Directionally it's correct, but realistically you won't see any improvement in your fuel economy
 
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Old Jun 7, 2008 | 06:52 PM
  #3  
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rplatt56
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i put flowmaster 40s on my 07 5.4. I lost 1mpg but got one hell of a kick in the pants on acceleration
 
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Old Jun 7, 2008 | 08:29 PM
  #4  
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Dustin1690
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From: Saskatoon Saskatchewan
really i dont see how exhaust changes the mpgs whether you gain a lead foot or not but i love the sound of aftermarket exhaust and flow 40s sound wicked
 
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