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Exhaust size question???

  • Thread starter Thread starter Gearbanger 101
  • Start date Start date Nov 8, 2004

Gearbanger 101

Straight Outta Locash
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Nov 8, 2004
#1
  • Nov 8, 2004
  • #1
Do you think a set of 1 5/8 mid length Kooks headers with mandrel bent catted 2 ½’ into 3” single, back out to 2 ½” dual exhaust would be enough to support 9psi and 425 flywheel horsepower?

I could save myself about $200.00 and a big headache doing it this way instead of running true duals all the way back. The headers are already costing me a mint as it is, so if this set up will support my horsepower levels, I'll do it.
 

Gearbanger 101

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20+ Year Stangneter
Aug 10, 2002
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#2
  • Nov 9, 2004
  • #2
Bump
 

mustang70

Founding Member
Nov 15, 2001
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Nov 9, 2004
#3
  • Nov 9, 2004
  • #3
Ok, I don't see how having to make a custom mid pipe with one cat is going to save you a headache. I would stick with the dual system myself.
 

Gearbanger 101

Straight Outta Locash
20+ Year Stangneter
Aug 10, 2002
9,457
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234
Ontario, Canada
Nov 9, 2004
#4
  • Nov 9, 2004
  • #4
mustang70 said:
Ok, I don't see how having to make a custom mid pipe with one cat is going to save you a headache. I would stick with the dual system myself.
Click to expand...
If you'll notice my signature....I don't have Mustang. It's for a Cougar, which running a single saves me a huge headache. The system will have 2-cats by the way, then Y-into a single 3", then back out to duals for tailpipes. I just wanted to make sure it would flow enough for my projected power levels?

Here a rough comparison....
Dual


Single
 

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mustang70

Founding Member
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#5
  • Nov 9, 2004
  • #5
Ahhhh ok. I'll blame it on the recent surgery. I think it would be enough size for you. The F-bodies run 3" intermediat pipes with two cats and make some decetn horsepower. So I think it'll be fine for you. Are the dual tips just for comestics?
 

Gearbanger 101

Straight Outta Locash
20+ Year Stangneter
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#6
  • Nov 9, 2004
  • #6
mustang70 said:
Are the dual tips just for comestics?
Click to expand...
Pretty much. I guess it mostly for sound, although I would imaging it aids to flow and equalizes exhaust pulses much like an X-pipe does. I figured it would do, since like you said the GM's have been running it like that for years. I was just worried that it might choke things down a little on the top end.
 

mustang70

Founding Member
Nov 15, 2001
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San Diego
Nov 9, 2004
#7
  • Nov 9, 2004
  • #7
Gearbanger 101 said:
Pretty much. I guess it mostly for sound, although I would imaging it aids to flow and equalizes exhaust pulses much like an X-pipe does. I figured it would do, since like you said the GM's have been running it like that for years. I was just worried that it might choke things down a little on the top end.
Click to expand...

With the F-bodies they recomend going with a one in one out set up. They said that doing the 180* turn to get to the passenger tailpipe wold restrict flow. But that's something you don't have to worry about.
 
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