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Old 05-31-2003, 07:16 PM   #1
SCOOBER
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Default WRX Intake Manifold to 2.5

Is this possible? I have heard the bolt patterns are alot different but have not compared them side by side. This would be a nice option, as it would make the fitment of the intercooler, etc alot easier....though I imagine finding a WRX manifold is not an easy task
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Old 05-31-2003, 09:24 PM   #2
Impreza Rider
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DOHC EJ25 Yes
SOHC EJ25 No
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Old 05-31-2003, 09:54 PM   #3
YaZahX
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Quote:
Originally posted by Impreza Rider
DOHC EJ25 Yes
SOHC EJ25 No
u sure?? because the DOHC phase 1 2.5L heads have inline bolting, the wrx is staggered right?
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Old 06-01-2003, 02:25 AM   #4
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Actually, its the exact opposite of what Impreza Rider posted. That is if youre talking about the 2002+ WRX. You will need the tgv valve assemblies too, it would be most beneficial to use the STi RA ones.
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Old 06-01-2003, 07:18 AM   #5
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I thought it was neither? the WRX one doesn't work on the RS heads...
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Old 06-01-2003, 07:42 AM   #6
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Does anyone have a WRX and an RS (SOHC if possible) at their disposal to compare the bolt pattern?
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Old 06-01-2003, 11:44 AM   #7
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http://forums.nasioc.com/forums/show...e+manifold+WRX

http://forums.nasioc.com/forums/show...e+manifold+WRX

both give same confirmation... USDM WRX IM will bolt on to SOHC heads but need modification...
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Old 06-02-2003, 01:40 AM   #8
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So it will fit, but there was a comment in one of the threads about having to use the WRX T/B...anyone try this yet? How is the AIC setup vs the RS? I am not really looking to put the intake under the manifold...just use it to move the I/C back from the firewall and to allow me to run my Cusco strut brace again....the other advantage would be the ability to use regular Y pipes and upgraded TMIC's with the extra clearance!
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Old 06-02-2003, 02:16 AM   #9
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Can you reverse it like i did?

but it would be nice to use the WRX manifold... its just i think you need to modify it.

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Old 06-02-2003, 08:38 AM   #10
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That is a nice looking setup, Hok! I can't reverse mine....unless I am missing some special secret trick. I think you have two sets of holes on yours...I only have one. How did you run your breathers and BOV return back to the intake? and what kind of filter is that....it's friggin' huge!! Is it oiled or dry....I don't seem to have much luck with oiled filters with my MAF!!
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Old 06-02-2003, 12:40 PM   #11
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yea i had to drill two sets of holes.. but i think it was work it.. quite fun.. it was a lot easier then modifying everything else... I thought it would be better... the BOV routing is actually quite long... the stock WRX pipe is used to the turboXS bov that is at a 90 deg. and i pipe that goes to the intake... The intake is a Sonic Blitz filter.. its oiled... and i have NEVER blew a MAF before this intake and when i put this on new i blew it because of the oil. Once the turbo sucked out enough oil it runs fine now.. but that was my first blown MAF in 3 years... I clean and oil my filter regularly... and i used very little oil..i also use those blue work towels to run over the filter when freashly oiled and it stays fine.. i forgot to when i put the filter in...
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Old 06-02-2003, 01:12 PM   #12
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I don't know why you would want to put a WRX manifold on an RS, I was reading somewhere that the RS manifolds flow more air than almost anything out there. What blew my mind is that it flows more air then the newest Gen of Vettes. I saw hack on it and make the IC work myself... I will see if I can find the place that did the flow tests on the manifolds...
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Old 06-02-2003, 06:23 PM   #13
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I am going to guess that you are not using the WRX turbo setup based on the charge pipe position and the way you have your filter setup....is that correct? Did you just have nipples welded to a pipe for the breathers, etc?

Anyway, thanks for the tip on the strut brace......not sure why i didn't think of that before...
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Old 06-03-2003, 12:02 AM   #14
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hahaah actually a honda guy asked me if that filter was a turbo yunno... serious... but he wasn't an hardcore enthusiast in his defence...
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Old 06-05-2003, 11:23 AM   #15
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Hey, HOK
What intercooler is that?
I'm asking cause, I'm getting a Ludespeed kit w/ spearco TMIC and was wondering if my STi bar (like yours) will clear it?

Thanks
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Old 06-05-2003, 01:08 PM   #16
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its the stock WRX intercooler... I don't think that your STI bar will clear the ludespeed... i havn't seen the intercooler myself... but i wouldn't believe that it would... because the STI is a very tight fit.. if you have an an inchand a half between the firewall and the IC then it might...
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Old 06-06-2003, 11:07 AM   #17
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Didn't think it would fit.
O well I'll just do without the bar for a while then get a front mount.
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