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I'm fairly sure the Eibach spacers are hubcentric, been a while since I took the wheels off. I wanted 10s up front but I went with Eibach's recommendations all round - in a time before forum browsing.
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I have 10mm Eibach spacers on my GTI.
The 8mms I tried weren't...
The hub lip is 8mm...so I can't see how Eibach can make 8mm hubcentric spacers...but I might be wrong.
As long as they are hubcentric...they'll be fine.
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Eibach say that it's best with 8mm up front and 15mm at the rear.
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That's one opinion...and who's to say it's wrong.
10/16 would work well too...or 16/16 (from experience)
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Along with their 22mm ARB up front. They make rear bars for the other A3/TT models, but not for the 225 quattro.
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I can't possibly suggest you fir a larger front ARB and leave the standard rear bar in place...it's stupid.
That makes an understeery car even worse...
Not good.
You need larger ARBs all round (to resist the bulk of the car) but proportionally larger at the rear to sort out the chasis balance.
The Neuspeed ARBs just work...
I have Eibachs on my GTI...they work.
But on an S3, they've got it wrong.
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Neuspeed bars might be just another thing for the summer shopping list...
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I would not suggest you spend your hard earned on an unknown quantity...when the Neuspeed stuff just works...and works sooooo well.
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Mheh, and here's me thinking it was the best mod to date! I guess we all drive differently. This is the one things that's really changed the cornering attitude for me. I know what it does, but it seems to change the feel of the car far beyond shoving a bit more power rear-wards.
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I'm not saying it doesn't do what it's supposed to..I'm sure it does.
But it does it by using clever electronics to mask the basic fundamental faults in the S3s chassis...you sort them out, and it adds nothing...you don't need it.
Sort the damping, spring rates, ARBs, camber, toe, tyres, tyre pressures and you have a very organic S3 that can be driven very hard indeed...without requiring electronics to mask basic faults.
But, as always, there is more than one way to skin a cat...