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Old 08-14-2005, 06:36 PM   #1
mrtrex
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Member#: 12223
Join Date: Nov 2001
Chapter/Region: MAIC
Location: Pittsburgh Pa
Vehicle:
2005 WRX

Default What is the size of the front and rear sway bar on a 05 wrx, and should I up grade?

I am building the car for autocross. My set up now is Progressive coilovers 350 front 250 rear, rotas with falken azenis. The car is pretty stiff through the turns what do you autocrossers think?

From SPDusa.com

The 4-door WRX now has 19mm front and 20mm rear anti-roll bars. We recommend changing the 18m bar fitted to the 5-door be swapped out with the SPD 20mm bar. We remain politely ambivalent towards fitting the car with larger anti-roll bars. They are a convenient way to reduce body roll in corners with mild spring rates, but ultimately make the car a bit harder to control at the edge of traction. It is not an accident that we use 17mm front and 18, 19, or 20mm rear bars on our gravel suspension Group N rally cars instead of larger bars. On smooth track big bars and big springs are effective, but with milder spring rates and the possibility of driving on mixed or rough road surfaces I still prefer to run more spring and standard bars. The car has a smoother transition into corners, reducing the chance of spinning the car. The chassis will respond much too quickly for my taste at the limit with larger bars and mild spring rates, and the car will have much better traction off corners with reasonable bar sizes. I do not deny the larger bar setup's popularity. Just come follow me into a rough, lumpy corner some time. I can drive to the edge with much greater confidence. The lighter bar combination gives more stability and control under braking and will pull off the corner with better traction.
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Last edited by mrtrex; 08-14-2005 at 06:59 PM.
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Old 08-14-2005, 08:58 PM   #2
DrD
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Location: Albuquerque, NM
Vehicle:
2012 Legacy 2.5GT
Ice Silver Metallic

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I thought that the USDM WRX had a 20mm up front and a 17mm in the back (with the exception of the 02/early-03 sedan, which had a 20mm bar in back as well)
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Old 08-14-2005, 11:18 PM   #3
Subie Gal
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Chapter/Region: NWIC
Location: WA
Vehicle:
1970 FF-1 & '70 Van
02 WRX/01 RS

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the 2004 2005 and 2006 wrx's (all of them)

have 20mm front, and 17mm rear bars.


for the street? 20mm front and 21-22mm rear is a fine ride

but what they said there is 'true'
i run 20/20 on my rally car... (5 door)
and it's very neutral.

cheers
Jamie
www.subiegal.com
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Old 08-14-2005, 11:20 PM   #4
HomerJay
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2005 WRX WAGON
Silver

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You can buy a stock 02-03 wrx sedan swaybar and replace it. Make sure to get the correct bushings for the mounts because they were changed for your model year. I don't know if it's been tried but you can try reusing your existing bushings.
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Old 08-14-2005, 11:24 PM   #5
Subie Gal
GC84Ever
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Join Date: Sep 1999
Chapter/Region: NWIC
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Vehicle:
1970 FF-1 & '70 Van
02 WRX/01 RS

Default

17mm bushings will not fit on a 20mm bar

best to get new 20mm sti rear sway bar bushings
and a 20mm bar if that is the route you decide to go....

Jamie
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