Have u considered Wilkinsons suspension? They did an awesome job of setting up my RX7 that included having to deal with 20" wheels as well Brett has experience with WRX's as well so may be worth dropping in and having a chat.

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"ALLPAWS" 2014 WRX RS 40 - modding very slowly.
2002 Mitsubishi Airtrek Turbo R - Ralliart Edition (daily)
2010 Nissan GT-R - when the Missus let's me drive it :)
Crotch Rockets . . .

+1 to Wilkinson.

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport

I have spoken to John Fowler in the hopes of finding a solution to my issue, but with no success.
Damien and Doug have also assisted with a check up of the car (changed out the Whiteline Roll Centre Kit to see if it was the suspect) and still not being able to resolve the issue.
Reverting back to known good OEM struts will assist in determining the cause and hopefully offering a solution.

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2015 Forester XT Premium
2020 VW Tiguan Allspace
teejay: If I wanted a comeback Id wank in front of a fan

Slight update in regards to what has been discussed in this thread.

I have now ordered some parts for the front of the car but I don't think that these will arrive before the car is due for its next service.
I'll also be purchasing a set of 7/6 MCA Red coilovers to replace the current Koni/RCE setup on the car, these will most likely be installed before the end of the year with the other goodies that have been ordered.
Went for 7/6 as suggested by Josh from MCA, only 16% firmer on the fronts compared to the setup on the car at the moment (6/6), if this isn't enough for what I want for getting involved in motorsport next year then I can easily get firmer springs.

I'll update with pics once the gear has arrived

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2015 Forester XT Premium
2020 VW Tiguan Allspace
teejay: If I wanted a comeback Id wank in front of a fan

Time for a small update.

Today saw the removal of the Whiteline roll centre/bump steer kit (KCA313), Whiteline anti lift kit (KCA334) & Whiteline KCA409 Comp-C top hats and the installation of OEM top hats and 2011+ WRX STI front lower control arms.

If any one is interested in doing this, all that needs to be done is remove the two bolts that the WRX LCA slides onto and use two bolts that fit the larger inner diameter of the pillowball found on the STI LCA.

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2015 Forester XT Premium
2020 VW Tiguan Allspace
teejay: If I wanted a comeback Id wank in front of a fan

Why did u remove the whiteline stuff?

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"ALLPAWS" 2014 WRX RS 40 - modding very slowly.
2002 Mitsubishi Airtrek Turbo R - Ralliart Edition (daily)
2010 Nissan GT-R - when the Missus let's me drive it :)
Crotch Rockets . . .

Comes down to not being overly happy with the quality of some Whiteline parts and concerns due to others that I have know who have encountered issues with the same parts.

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2015 Forester XT Premium
2020 VW Tiguan Allspace
teejay: If I wanted a comeback Id wank in front of a fan

I hear the Perrin gear is a lot more suited to daily duties than the Whiteline - Less noise and a better fit.

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2005 WRX STI

Did this get rid of the noise that's been dogging you for a while now?

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Bye bye betty blue. Hello F6.

Not as pronounced but still there.
Ruled out everything now except for the end links and swaybar/bushings, I expect the koni struts/inserts are the source of the noise.
Don't have the stock suspension so I can't rule it out at the moment and to be honest, I'm giving up on caring

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2015 Forester XT Premium
2020 VW Tiguan Allspace
teejay: If I wanted a comeback Id wank in front of a fan