wrbusa

So H&R does not have fwd type 89 or B4's listed on their website under applications. For fwd, you can reference the 20v or 100 fwd applications for the front, but anything with a hub extension will not fit on the rear axle.

However, there is a notation mentioning the part number 040234572 for our application.
<img src="http://pictureposter.audiworld.com/126375/spacers-007.jpg">

It appears to be a 'normal' 20mm spacer (p/n 040234571) with a little extra bored out.
<img src="http://pictureposter.audiworld.com/126375/spacers-006.jpg">
<img src="http://pictureposter.audiworld.com/126375/spacers-005.jpg">

Why go through all this?
Well, I wanted to get rid of these fugly plastic center caps that came with my cheap-0 wheels:

<img src="http://pictureposter.audiworld.com/126375/spacers-001.jpg">

and replace with these beautiful pieces:

<img src="http://pictureposter.audiworld.com/126375/spacers-002.jpg">

...Because they wouldn't fit due to the extruding wheel bearing dust cap in the back.

So this is how the car sits now. 15mm spacers on the front, 20mm in the rear. There's maybe a bit more poke than I'd like (wheels are et38), but the added stability is a bonus.
<img src="http://pictureposter.audiworld.com/126375/spacers-010.jpg"><ul><li><a href="https://forums.audiworld.com/9080/msgs/456224.phtml">Old thread</a></li></ul>

iProDrive

Lookin' good!

SCarGo02

Are those Audi center caps metal or plastic? If metal you could strip and then polish them...

iProDrive

They look plastic to me.

wrbusa

Actually they're cast aluminum. Good idea!

iProDrive

bonus!

SCarGo02

...but it might spruce things up a bit further. I'd imagine if you thew a coat of clear on them after polishing they might have a finish like the wheels. It was just a thought either way though.

The Audi center caps definitely look better though!