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Old 10-01-2009, 04:54 PM   #1
legacy2003
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Member#: 38338
Join Date: Jun 2003
Chapter/Region: MAIC
Location: Washington, DC Metro
Vehicle:
2003 Outback Sdn H6
Black

Impreza GC8 Is an 04 USDM STI front sway bar identical to an 04 WRX sedan front sway bar?

Hey guys,

I have a swapped GC8, in which I used a GD STI front crossmember to replace my N/A GC8 front crossmember (necessary when doing a turbo engine swap in a Subaru). Anyway, for a long time I used my stock RS control arms (shimmed the bushings, a usual practice among swappers using the GD crossmember) and a WRX wagon front sway bar. This is an equivalent setup on a stock WRX wagon, which uses narrower control arms than a sedan (basically same as RS control arms actually), and I used a WRX wagon front sway bar.

Recently, I "upgraded" to WRX sedan control arms, which gave me the wider track in the front of the car. My RS control arms were all worn out in the bushings, so I figured I would upgrade the control arms to the wider ones. In accordance with this upgrade, I also changed the front end links from the wagon (plastic) style to the sedan (flexible metal) style. I should have changed the front sway bar from the wagon to the sedan as well, but I didn't (keep reading, this is the problem).

However, because the sway bar width (side to side, not diameter here) is wider on the WRX sedan vs. the WRX wagon due to the wider vs. narrower control arms, I can't really use my WRX wagon front sway anymore. I am right now, with sedan end links, but the end links are stretched a lot for the narrower wagon front sway bar. I notice that despite getting a good alignment, that if I turn hard I can hear popping and the car will pull a bit to one side, which I am assuming may have something to do with running too narrow of a sway bar.

With that all said, I obviously need a WRX sedan front sway bar to rectify this situation. However, what I have in my possession is an 04 STI front sway bar, which came with my crossmember. Is it the same width (side to side) as a WRX sedan (let's say 02-05 - GD) front sway? I guess I am not sure if there is a difference between the aluminum STI front control arms (if they are even wider than a WRX sedan's steel control arms or if they are equal in width, or just that the material - aluminum vs. steel - is different, and the width is the same?).

If this belongs in the conversions forum, mods please move.

Thanks!

Cliff notes: Is the width from side to side of a GD STI front sway bar the same width as a GD WRX sedan front sway bar? I don't care about diameter/thickness of the sway bars, just that it will fit my swapped GC8 properly. I am using GD WRX sedan front control arms, NOT STI aluminum front control arms.
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Last edited by legacy2003; 10-01-2009 at 05:33 PM.
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Old 10-01-2009, 05:25 PM   #2
legacy2003
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Member#: 38338
Join Date: Jun 2003
Chapter/Region: MAIC
Location: Washington, DC Metro
Vehicle:
2003 Outback Sdn H6
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Whoops, seems like a thread a few threads down from mine answered my question. It sounds like it will work for me, but since my car is such a cluster of Subaru parts, maybe I should make sure, because in that thread he has STI front control arms whereas I am using WRX sedan front control arms...

Last edited by legacy2003; 10-01-2009 at 05:32 PM.
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