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Old 04-29-2004, 08:05 AM   #1
96 Flat Four
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Default New struts

own a 1996 AWD Impreza Outback. The car is in need of shocks on all 4 corners and I am wondering what my best replacement option is. The only suspension mod I have made is switching to an 18 mm sway bar on the rear. I am looking at installing KYB GR2s, but I notice that KYB's catalog list a different rear strut for the Impreza Outback than for all other Imprezas. My question is, how does the 1996 Impreza Outback Sport differ from the other Imprezas? Could I switch to the GR2 or even the AGX shocks listed for all non-Outback Imprezas. Any advice would be helpful.

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Old 04-29-2004, 09:47 AM   #2
GuyLR
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Also, if the GC8 AGX rears can't be used, does anyone know how a combination of AGX up front and GR2 in the rear would work on the OBS?
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Old 04-29-2004, 10:13 AM   #3
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I'm pretty sure you can use AGX's on all four corners but I"ll have to get back to you on that.
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Old 04-29-2004, 05:23 PM   #4
Subie Gal
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dont see any reason you couldnt use the AGX's...

heck i even installed the AGX's for the impreza into my Legacy

should bolt right up
make sure you have decent springs.

Jamie
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Old 04-29-2004, 07:33 PM   #5
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I have tried to get definitive answers to the actual physical differences between teh OBS and the other Imprezas without much luck. Some sites list the same springs for all, others (like Whiteline) SEEM to suggest the springs are different. Most sites do not show AGXs for the rear,(including KYBs catalog) but a lot of folks seem to be able to use them. I THINK (from putting some clues together from about 3 different sources,emails,websites) that the struts (at least the rear struts) have more distance between the spring perch and the hub attachment - maybe less than 1/2 inch. cars101 says the OBS was about 0.3 or 1/2 inch higher ground clearance (I forget exactly) than other Imprezas. maybe some dealership guy could measure some repalcement stock struts for us and tell us which spring part numbers (if any) are shared from the OBS to other Imprezas. I am most interested int e MYs '99-'01 myself.
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Old 04-30-2004, 06:05 AM   #6
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AFAIK the rear disk model OBS just has longer springs to increase ride height. I remember reading somewhere that the OBS and RS share the same struts, and several people have put GR2 and AGX struts on the OBS without issues, though they were also using shorter springs.
It's probably safe to say that the rear drum years can't be fitted with AGX struts in back, but they will fit up front. Apparently the GR2 isn't so fussy and fits with either disks or drums...
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Old 04-30-2004, 04:55 PM   #7
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Rear drums make no difference in choice of struts. Non-awd cars need different rear struts.
Don't sweat this, you can use AGX or GR2. The OBS springs are slightly taller than L or RS springs but it is no biggy. I run sedan springs and sedan AGX in my wagon and it is all good. Lots of guys run OBS springs in their sedan for rallycross. No problem.
The strut length and spring length difference are all within an 1 inch. It will make a little difference on the amount of camber you see. The wagon spring rate tends to be a few lbs heavier in the rear compared with a sedan to compensate for extra weight and loads. This adds up to about 1/4 inch. Again no big whoop.
Also part of the increased ride height that the OBS has is due to the taller tire sidewalls.
If you want to autox, go with the AGX. If not, the GR2s will do just fine.
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Old 04-30-2004, 10:22 PM   #8
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Quote:
Originally posted by linsavy
Rear drums make no difference in choice of struts.
I don't know if the brakes are the reason for the KYB catalog differences. I can tell you from experience that (for example) STi struts and even some older WRX units do not fit on drum knuckles.
FWD/AWD rear struts are incompatible as you state.
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Old 05-01-2004, 12:48 AM   #9
96 Flat Four
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Thanks everyone for all the help. I really appreciate the info. regarding the different spring length and rate. In the final analysis it sound like I could use either GR2s or AGXs, but that if I am going to use GR2s there is no advantage to using the struts listed for non-OBS impreza and that I should just use the struts that KYB reccommends for my car.
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Old 05-02-2004, 09:10 AM   #10
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Quote:
Originally posted by redwagon
I can tell you from experience that (for example) STi struts and even some older WRX units do not fit on drum knuckles.
That is interesting, I stand corrected.

For the GR2s you should likely try to get the OBS specific ones, but if they are not available then the sedan ones will work too. You might need to adjust the rear camber with some camber bolts or by slotting the struts slightly to get back to spec. A little too much camber say -1.0 degree will not hurt your tire wear, but it will make the car want to understeer a little much.
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