View Full Version : Reusing Spring Perch Bushing

07-22-2018, 08:45 AM
I just purchased a cup kit off ECS as well as the install kits they have. I seem to have missed the part where I was not given the lower perch bushing for the front (at 70 each) and really canít stop asking myself if I should buy them? Iím too old to be doing things twice, but at the same token I feel the majority of compressive strain would be felt by the upper from the spring/strut resistance to road inconsistencies. At the same time, considering the style in which struts mount that compressive load would have to be created by the lower perch in the first place.....

Curious what peopleís experience has been before setting the day aside to do it all.


07-25-2018, 07:35 PM
bump, i have every single item new except the lower front spring perch bushings, do i hold out 2 more weeks or say F it?

07-25-2018, 09:21 PM
bump, i have every single item new except the lower front spring perch bushings, do i hold out 2 more weeks or say F it?

two weeks, what?? The $70 audi price is for the spring perch too, not just the bushing. you can knock those off the old shocks with a hammer. You could goto the dealer and get parts next,few day and you can usually talk them into matching FUCKECS prices. BUUUUT just order it off rock auto, $20usd~ shipped for them. it takes 3 days for me to receive parts in Canada. part number 8D0412066F https://www.rockauto.com/en/moreinfo.php?pk=8205128&jsn=407

07-25-2018, 09:23 PM
looks like the rock auto one is the perch too (hint hint b6 guys)

07-26-2018, 06:48 AM
^That is not exactly the ones they are after. Please allow me to explain the spring perch situation.

There are 2 different versions of B5 lower spring perches. The "early B5" 2-piece version, and the "late" 1-piece version. (Late version starts at VIN "8D-1-030 001", so basically 2001.5).

On the B6 chassis, the spring perches are all the "late" type, but they are a fancy aluminum version...because Audi was drunk on reducing unsprung weight with the B6 (uprights, lightened hubs, keeping the tiny brakes, lol).

To my knowledge, you can interchange all 3 of these types (on factory shocks), however, the "early" version gets you a slight ride height drop (all other things being equal). This is what all the B6 guys want: the 2 piece "early" B5 version. These are the ones which are "in-demand".

Some photos:

"Early" 2-piece B5 perch (8D0-412-103-B + 4D0-412-107-B):
Sometimes referred to as "B5 lowering caps", which makes no sense...but whatever:


"Late" 1-piece B5 perch (8D0-412-066-F):

"Lightened" 1-piece B6 aluminium perch (8E0-412-066-B):

07-26-2018, 07:06 AM
But Mr. Walky, how does this apply to a Cup Kit with Bilstein shocks?

For the last time, it's Mr. Talky, because that is my last name. [>_<]

The B5 Cup Kits (as listed on ECS for instance) take into account which spring perch type they are *assuming* you still have attached to your B5...20 years after it was made. And they further assume you want to reuse that junk, whatever its condition.

There are 2 versions of these B5 kits, the "early" version and the "late" version, to go along with the two different B5 factory spring perch types. Again, the original factory VIN split is "8D-1-030 001".

Early Version:
- You must provide the early 2-piece spring perch parts. They do not come with any perches.
- These are OEM only and are pretty expensive.
- Uses special, tiny small-diameter Bilstein shocks to make that work.
- I can't believe they even still make these.

Late Version:
- You provide the later 1-piece perch/isolator parts. You can get brand new ones for cheaps.
- Uses the full-size standard-diameter Bilstein damper design (for the win).
- Being quite physically larger, these should offer longer life, and be more easily repaired/revalved being the more standard size.
- When installed on a B5, these may sit a little higher in the front than the early version. Anecdotal, YMMV.

So the thing they aren't telling you is that the "late" kit is pretty much the better kit, and will fit all years of the B5 with no problem (by obtaining some cheap "late" perches if necessary). The "early" version uses tiny, non-standard front shocks and requires reusing your 20-year old parts (or getting new stuff for lots of money).

07-26-2018, 07:47 AM
So yeah that was a lot....

I bought everything new (hardware etc) for 125. i am not paying 70 a side for the lower bushings, but ecs will not have the aftermarkets until Aug 7th.

Im just going to wait, they guy put eibach springs on stock struts and i can feel one corner blown, so yeah its worth 45 bucks and 2 weeks wait i guess.

[headbang] Everyday I go through this car and find something else.....Lesson learned next time I'm taking it apart before i buy.