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Best performing pipe size

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Old May 12, 2009 | 04:31 PM
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From: Douglasville GA
Best performing pipe size
What's the performing pipe size for a true dual application?
 
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Old May 12, 2009 | 05:13 PM
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2.25" I believe. I think some tend to go 2.5" due to the sound preference.
 
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Old May 12, 2009 | 05:16 PM
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correct
 
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Old May 12, 2009 | 06:34 PM
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Originally Posted by TruckGuy24
2.25"
x2.
 
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Old May 12, 2009 | 07:17 PM
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So should I have a shop cut out all the existing pipes right after the cats and start 2.25 from there or should I start that size right before/after the X-pipe?
 
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Old May 12, 2009 | 07:25 PM
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Originally Posted by 4.6 Punisher
So should I have a shop cut out all the existing pipes right after the cats and start 2.25 from there or should I start that size right before/after the X-pipe?
After the cats would be best. Some people start with 2.25" cats but end up with CELs.
 
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Old May 12, 2009 | 07:38 PM
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Originally Posted by DarrenWS6
After the cats would be best. Some people start with 2.25" cats but end up with CELs.
my 08 f150 5.4L has 2.25" true duals starting after the cats and an x-pipe, and no mufflers. good performing, the sound is deffinetly not as loud as 2.5" tho.
 
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Old May 12, 2009 | 07:43 PM
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Well, I'm all about performance first and sound second.... most of the time.

One more question:

Would hi-flow cats improve performance significantly over OEM cats (2 OEM cat configuration).
 
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Old May 12, 2009 | 07:47 PM
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Originally Posted by 4.6 Punisher
Well, I'm all about performance first and sound second.... most of the time.

One more question:

Would hi-flow cats improve performance significantly over OEM cats (2 OEM cat configuration).
im not sure excatly how much, but you will gain. i want to get a set put on my truck, just havent gotten around to it yet, hopfully this summer!
 
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Old May 12, 2009 | 07:49 PM
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From: Mansfield, P.A.
Magnaflow hi-flow cats flow 44% better than OEM, you will gain in economy, and performance.
 
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Old May 12, 2009 | 07:52 PM
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Then I'm going to have those done as well. Now all I need is that pesky thing called money....
 
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Old May 12, 2009 | 08:02 PM
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yah money is a weird thing...the more you have of it the better stuff u have..interesting concept
 
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Old May 12, 2009 | 11:01 PM
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Ok, how about a single exhaust, would 3" single be an ok option? I have a 5.4 expedition.
 
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Old May 12, 2009 | 11:09 PM
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Originally Posted by Justin99Expo
Ok, how about a single exhaust, would 3" single be an ok option? I have a 5.4 expedition.
For single exhaust 3" is best performing.
 
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Old May 12, 2009 | 11:39 PM
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I hate to sound ignorant but dual 2.25's would perform better than a single 3 right?
 
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