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Old 08-11-2007, 12:52 PM   #1
GrimmSpeed
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Default 02-05 vs. 06-07 WRX / STI Exhaust Manifold

I know alot of people always have questions/doubts about the difference between the 02-05 and 06-07 wrx exhaust manifolds....they are in fact different. All of the 02-05 wrx's and 04+ sti/lgt exhaust manifolds are the same...only the 06-07 wrx's are different.

The differences are minor:
-crosspipe in the 06-07 only has one bend compared to the others

-passenger side collector in the 06-07 has a longer/narrower turn back going from the exhaust ports to the up pipe

-driver side collector in the 06-07 is almost identicaly to the rest except for it has a slightly smoother 90* bend. the easiest way to tell what year the driver side collector is is by the positioning of the egt tap button in relation to the divider line between the two ports.


With this side, you absolutely can not fit an 06-07 crosspipe onto an 02-05 wrx design. i've seem some retailers out there saying the pipe fits all years, but this is not true. with that being side...we'll have an option for you 06-07 guys asap

also, you CAN swap out complete manifolds from 02-05 vehicle to 06-07 but not other way around. you CAN NOT mix match parts from the different designs. for example, no putting an 06-07 crosspipe together with the 02-05 end collectors.

oh, and there is no difference in the 02-05 wrx and 04+ sti exhaust manifolds...peopel think the sti is a high performance piece but it simply isnt.


02-05 wrx, 04+ sti/lgt



06-07 wrx



hope that clears it up.

Justin
www.grimmspeed.com
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Last edited by GrimmSpeed; 01-02-2008 at 10:49 AM.
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Old 08-11-2007, 12:57 PM   #2
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i guess i should have arranged the pieces in the pics to be the same...o well
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Old 08-11-2007, 02:28 PM   #3
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so which design is better?
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Old 08-11-2007, 04:33 PM   #4
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Justin,

You forgot to tell the 06-07 cast pieces do have thinner wall thickness, they are lighter. Furthermore the 06-07 complete manifold will not fit the older cars or STi! (the crosspipe will not clear the oil filter)

Mark.
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Old 08-11-2007, 04:56 PM   #5
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So dose any one know of one will out flow the other?

And I wish mine where nice and black like that! But there rusty. Oh well Ill just rap them and call it good!

Later.
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Old 08-11-2007, 05:28 PM   #6
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Quote:
Originally Posted by Badmunky View Post
So dose any one know of one will out flow the other?

And I wish mine where nice and black like that! But there rusty. Oh well Ill just rap them and call it good!

Later.
I didn't measure exact dimensions, as it isn't easy to measure the inside dimensions... But they seem quite identical to me. (except for the outer dimensions!)

Mark.
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Old 08-11-2007, 07:27 PM   #7
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Default good pix

+1 to the thread creator

Facts and pix are good.
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Old 08-12-2007, 12:16 AM   #8
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Yea....

I found out the hard way on this by using my friends 05 STi driver side manifold to drill and tap for an EGT. Pulled mine off, put my friends manifold on my car and it wouldn't bolt together. So I had to tap mine and now my friends manifold has a nice hole in it. Don't worry he has a header on his car.
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Old 08-12-2007, 11:54 AM   #9
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Quote:
Originally Posted by DZnutz View Post
so which design is better?
i'd say the are about equal.

Quote:
Originally Posted by EMS View Post
Justin,

You forgot to tell the 06-07 cast pieces do have thinner wall thickness, they are lighter. Furthermore the 06-07 complete manifold will not fit the older cars or STi! (the crosspipe will not clear the oil filter)

Mark.
truth. the 06-07 definitely has a thinner wall. i know the older mani's will fit on the new stuff...but i thought i fit a newer mani on the older cars too....maybe not though.
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Old 08-25-2007, 03:15 AM   #10
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Question, so the x-over pipes are specific to 06-07wrx and the other models? I wanna send an 06 wrx mani but I guess I cant use the v1 xover with it?
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Old 08-25-2007, 04:36 AM   #11
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06+ manifold require 06+ crossover
02-05 manifold requires 02-05 crossover

can't mix and match.
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Old 08-25-2007, 09:49 AM   #12
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Good to know.
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Old 08-25-2007, 10:18 AM   #13
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what about the FXT?
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Old 08-25-2007, 11:25 AM   #14
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OMG 08 mess!!!
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Old 08-25-2007, 01:12 PM   #15
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Quote:
Originally Posted by Unabomber View Post

OMG 08 mess!!!
That's nasty, ewwww

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Old 08-25-2007, 08:13 PM   #16
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Quote:
Originally Posted by Unabomber View Post


OMG 08 mess!!!

Quote:
Originally Posted by Nuke209 View Post
That's nasty, ewwww

NO WAI!! thats equal length!!! hell ya...
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Old 08-25-2007, 08:41 PM   #17
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Quote:
Originally Posted by Nuke209 View Post
06+ manifold require 06+ crossover
02-05 manifold requires 02-05 crossover

can't mix and match.
So the grimmspeed x-over is for 02-05 wrx and sti 04+ correct?

I guess I have to try and hunt down another set of manis.
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Old 08-26-2007, 12:24 AM   #18
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Quote:
Originally Posted by GrimmSpeed View Post
I know alot of people always have questions/doubts about the difference between the 02-05 and 06-07 wrx exhaust manifolds....they are in fact different. All of the 02-05 wrx's and 04+ sti/lgt exhaust manifolds are the same...only the 06-07 wrx's are different.

The differences are minor:
-crosspipe in the 06-07 only has one bend compared to the others

-passenger side collector in the 06-07 has a longer/narrower turn back going from the exhaust ports to the up pipe

-driver side collector in the 06-07 is almost identicaly to the rest except for it has a slightly smoother 90* bend. the easiest way to tell what year the driver side collector is is by the positioning of the egt tap button in relation to the divider line between the two ports.


With this side, you absolutely can not fit an 06-07 crosspipe onto an 02-05 wrx design. i've seem some retailers out there saying the pipe fits all years, but this is not true. with that being side...we'll have an option for you 06-07 guys asap

also, you CAN swap out complete manifolds from any year vehicle to another. for example you can put an 02-05 wrx manifold on an 06 wrx as long as you swap over the entire thing. you CAN NOT mix match parts from the different designs. for example, no putting an 06-07 crosspipe together with the 02-05 end collectors.

oh, and there is no difference in the 02-05 wrx and 04+ sti exhaust manifolds...peopel think the sti is a high performance piece but it simply isnt.


02-05 wrx, 04+ sti/lgt



06-07 wrx



hope that clears it up.

Justin
www.grimmspeed.com
Very important to know. Some vendors do a core charge and want you to send in stockers after receiving PNP stockers. I've always read the arguements on the " 06-07 header difference" between other years. Pics. don't lie. Thank you.! Also, a strighter pipe always out flows one w/more bends.
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Old 08-26-2007, 10:45 AM   #19
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Quote:
Originally Posted by Magnum626 View Post
So the grimmspeed x-over is for 02-05 wrx and sti 04+ correct?

I guess I have to try and hunt down another set of manis.
Yes, I'll have to correct myself

06+ wrx can only use 06+ wrx crossover
02-05wrx / 04+ sti manifold to only use 02-05wrx / 04+ sti crossover

can't mix and match.

06+ wrx crossovers....anything on that Grimmspeed?
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Old 09-03-2012, 12:32 PM   #20
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So, bringing this thread back from the dead: just to make sure I'm getting this right. So the 02-05 & the 08+ WRX have the same headers and x-pipe as the 04+ STi. So by that knowledge, it would be safe to say that if I do hop from my 11 WRX into an 07 STi, I can transfer the exhaust manifold, x-pipe and UP over. Am I understanding right?
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Old 09-03-2012, 06:21 PM   #21
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You are correct, all of those are the same!

Mike
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Old 09-04-2012, 10:53 PM   #22
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Quote:
Originally Posted by GrimmSpeed View Post
You are correct, all of those are the same!

Mike
Awesome, thanks for the info!! Now here's hoping I have some luck in finding someone willing to sell their stockers...... That, or some lucky bastard will get my car with the PnPed & coated GrimmSpeed headers.... Not if I can help it.....
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Old 08-03-2013, 03:51 AM   #23
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This thread answered all of the questions I was researching


Thanks
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