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Old 07-31-2012, 07:31 PM   #1
Scooby Guru
Member#: 3560
Join Date: Jan 2001
Chapter/Region: South East
Location: Four Oaks, NC
00 2.5RS, 06STi
06FXT, 95rallyimpreza

Default 1998 2.2L wagon upgrade to Group N brakes, etc.

Haven't been able to figure this out by searching, so I guess I'll have to start a new thread...

I have a 1998 Impreza wagon with no ABS, tiny front discs and rear drums. I've been driving it to work and rallyxing it, so that's been fine. But now we're turning it into a rally car, so I'm going to install some Group N gravel brakes that I have.

I'm using a 2004 STi suspension, and plan to continue to use GD suspensions on the car due to availability, but I'd also like to stop using camber bolts in the rear to get the camber where I want it.

So here are my questions:

In the rear, do I just need 06/07 WRX spindles, or do I need the lateral links and trailing arms? And will the original axles be long enough if I do need to swap lateral links? I do have adapters that allow me to bolt the Group N rear caliper onto a 2.5RS or 02-05 WRX spindle, but if I don't have to use them, I'd rather not. So I'm looking for 06/07 specifically.

In the front, can I swap the WRX sedan control arms in with everything else staying the same, or will this cause rubbing somewhere? I've found that the STi struts don't really change the front camber that much compared to the original struts, so I'm not using additional camber bolts in the front. But if this will give me a little more camber and/or caster, I'm in.

Thanks for the help, and let me know if I need to provide more info.
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Old 07-31-2012, 11:00 PM   #2
Scooby Specialist
Member#: 16819
Join Date: Mar 2002
Chapter/Region: SCIC
Location: Lake Elsinore, CA

To use the rear calipers your need to use a disc brake knuckle/hub. Might as well get '06-'07 parts and not use caliper adapters.

To use GD struts you need to use the GD lower control arm in the front and GD lateral links in the rear. Your front knuckles can stay the same. Technically, the rears could too if you were not also doing the brakes.

As far as the axles? Not sure. I've read many that say they will be long enough, but I would budget to replace them with GD parts to ease my mind.

Also pay attention to the length of the tie rod ends. I would imagine thay can be adjusted out far enough for the new lower control arms without issues.
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