Header to DP flange - Need Part Number

Tyson Varosyan tigran at tigran.com
Wed May 14 14:17:53 PDT 2008

Hi Guys,

I am trying to track down this gasket (again 86 4ksq - this is the gasket
between the header and downpipe) I am working with SJM and a few other
vendors and everyone is sending me pictures of stuff that looks nothing like
it should. Does anyone know the part number for this thing?

Tyson Varosyan
Technical Director, Uptime Technical Solutions LLC.
tyson at up-times.com
206-715-TECH (8324)

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Mark J. Besso
Sent: Wednesday, May 14, 2008 12:23 PM
To: audi at humanspeakers.com; tigran at tigran.com
Cc: Audifans
Subject: Re: Header to DP flange


I think you'll find the studs are 8mm thread which would put the 
wrench/socket size between 12mm-14mm depending on what was used.

The last time I did this job was many years ago, but I seem to recall it 
requiring no less than two extensions with a universal joint between them. 
 Use a 6-point socket as you don't want to round these off during removal. 
 If you round them off your only option may be cutting torches!

Now would be the right time to decide if this is a job better suited to a 
professional with a lift and air tools.  It's not something you want to 
start unless you can complete the job as driving around with the entire 
exhaust system hanging isn't real practical....if even possible.

Consider Chris at Fine Tuning on North Aurora.  He's at 206-522-5503.


On Wed, 14 May 2008 14:58:56 -0400
  Huw Powell <audi at humanspeakers.com> wrote:
  *This message was transferred with a trial version of CommuniGate(r)
> My 86 4ksq is now dobbed the "Laudi" because of a ginormous leak 
>between the
> header and downpipe.
> I crawled under the car and counted 4 rusty bolts around an 
> gasket that seemed impossible to get to.
> #1 Where do I get a replacement gasket for this juncture?
  Call anyone who sells import parts.  Heck, Atlantic had one in stock
  last time I thought I needed one.
> #2 How do I get at it? 
  Great suffering and torture, basically.
  There are 5 studs in the manifold sticking through the gasket and
  the downpipe flange.  I think they are 8mm but I might be wrong.
  It's easier to do with the engine out of the car ;)
  This might also be a good time to move your battery to the trunk if
  ever wanted to, since I think that would give you more access from
  Or try removing the intake manifold to get more access:
  As you can see, you can't see what you're working on:
  but this is what they look like:
  Huw Powell
  quattro mailing list
  quattro at audifans.com
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