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FXT Alumnus
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662 Posts
Discussion Starter #1
Does anyone know the physical differences between a Stock 04 STi header versus my stock OE 2004 FXT ?? I have an opportunity to pick one up cheap and want to judge the value of it.

Thanks in advance...
 

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Premium Member
2004 Forester XT
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815 Posts
I believe the XT header give you better low and midrange grunt, while the STi header gives a better top end. This is what I remember reading, others who have them will hopefully chime in.
 

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BLUE WASABI, (#2 Info Provider)
2008 SG Model D
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9,051 Posts
You won't gain that much from a stock STi manifold. Why don't you just port and polish the stock FXT one? Or just buy a used borla or aftermarket if you want real gains.
 
S

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Guest
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0 Posts
I added the STI manifold and I noticed on my logger a few more degrees of ignition advance at high rpm, and a higher MAF voltage, which tells me I'm making more power up top. It was noticable, but not huge. I didn't really port them much, just took off the burrs and the spots I thought weren't real smoooth.
 

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Asphalt Surfers Unlimited
2004 Forester XT
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742 Posts
Can someone please re-host the photos?

The Wee-Todd-Did links no longer work, and the old board is gone.


GTP? You out there? I can host the pics if you want.
 

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Registered
99 UK S-turbo
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8,566 Posts
Now thats the sort of research that is needed, fair play to him!

Simon
 

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11 sec club
04 Cayenne TT
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1,486 Posts
I've got a set of the 06 FXT manifolds and a set of 04 STi manifolds. The left sides are identical. The right side where everything comes together is much more open in the STi one.
 

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Premium Member
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497 Posts
04-05 FXT same as 06-up WRX - smaller diameter

04-up STI same as 02-05 WRX - bigger diameter (edit: 06-up FXT ?)

i think that's right...
 

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Registered
2004 FXT
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830 Posts
ant927 said:
04-05 FXT same as 06-up WRX - smaller diameter

04-up STI same as 02-05 WRX - bigger diameter

i think that's right...
Seems odd that the STI manifolds would be the same as the 2L WRX manifolds...
 
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