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Will straight pipes with catalytic converters increase horsepower/gas mileage?

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  #31  
Old 07-29-2010, 09:17 PM
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Yea the 5.4 should sound about the same, it wont help mpgs that much, you may notice a little change, but not all that much. But like i said itll sound better, plus its cheap.
 
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  #32  
Old 07-29-2010, 09:33 PM
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Originally Posted by BigCountry5387
Yea the 5.4 should sound about the same, it wont help mpgs that much, you may notice a little change, but not all that much. But like i said itll sound better, plus its cheap.
Ok sounds good, the only thing that bothers me is inspections..will it pass inspection without a muffler in New York?
 
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  #33  
Old 07-29-2010, 09:47 PM
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Yea, as long as you got all the catalytic converters your in good shape. The muffler doesnt do anything but make the exhaust quiter
 
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  #34  
Old 07-29-2010, 10:57 PM
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Originally Posted by dirtyd88
I got my ProComp efans (both) for $66 and some change shipped to my door. haven't installed them yet, hoping to this weekend.

if you do have a conservative driving habit, then I can say you will probably see a small noticeable increase. probably around the .7-1.0 mpg range...IMO.

btw, got any more pics of your truck by chance?
since I am eBay retarded with searching, can you send me a link to the exact fan you bought that'll work with our trucks. I have an 03 5.4 and I'm also on my iPhone in Mississippi waiting to go home to tn(just got back from Iraq) and I've been emailing my brother links and he orders stuff for me. thanks yall!
 
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  #35  
Old 07-29-2010, 11:38 PM
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Originally Posted by gatorboy112
since I am eBay retarded with searching, can you send me a link to the exact fan you bought that'll work with our trucks. I have an 03 5.4 and I'm also on my iPhone in Mississippi waiting to go home to tn(just got back from Iraq) and I've been emailing my brother links and he orders stuff for me. thanks yall!
Where at in MS I'm from there?
 
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  #36  
Old 07-29-2010, 11:42 PM
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honestly i dont care about "legal" or "illegal" i have true dual straights with 5" tips they increased milage from 18-ish to about 22-ish and there was definately a power gain.
 
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  #37  
Old 07-29-2010, 11:58 PM
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Originally Posted by dirtroadkidd08
honestly i dont care about "legal" or "illegal" i have true dual straights with 5" tips they increased milage from 18-ish to about 22-ish and there was definately a power gain.
That's a nice mpg gain, do you still have the catalytic converters on there? How do you get it inspected?
 
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  #38  
Old 07-30-2010, 12:18 AM
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at camp Shelby doing my demob so I can be home Monday. hopefully. where are you from?
 
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  #39  
Old 07-30-2010, 12:23 AM
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Originally Posted by gatorboy112
at camp Shelby doing my demob so I can be home Monday. hopefully. where are you from?
I from Pass Christian. Camp Shelby is Hattiesburg about a 45 minute drive from me. Been there half a million times. Although i'm not military.
 
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  #40  
Old 07-30-2010, 07:46 AM
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ahh well I still believe this is the arm pit of the country. this place sucks worse then anywhere else I've ever been, to include Iraq. lol
 
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  #41  
Old 07-30-2010, 09:20 AM
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gatorboy, look for eBay seller race114183

i got both of then for 66.35 to my door. shipping may be a bit different cost.
 
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  #42  
Old 08-08-2010, 11:25 AM
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How does the straight pipe affect back pressure? I tow a lot and need all the torque I can get but still want that sound of a straight pipe but heard back pressure is an issue.
 
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  #43  
Old 08-08-2010, 12:12 PM
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^ Do search for back pressure. This topic gets really old quick.
 
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