See Bentley 26.7 (or 13.32)
The Exhaust pipe, front  connects to #1 and #3 cylinder heads (as you can
see it's actually 1 pipe).
The rear exhaust pipe to #2 and #4.
Hope this helps
GerryR
----- Original Message -----
From: Steve Macaulay <smacaulay@INFINTIUM.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, August 23, 1999 10:38 AM
Subject: #1 and #3 exhaust pipes

> After doing a recent headgasket replacement, my trusted local non-dealer
> mechanic told me I need a new #1 and #3 exhaust pipes replaced on my 89
> Westy due to some holes/cracks in them that would prevent it from passing
> inspection next month (they are pretty rusty, so it wasn't a big
surprise).
> I have a Bentley but I couldn't identify from the picture and descriptions
> which pipes are considered to be the #1 and #3 pipes.  I'll know which
ones
> they are next week when I go to the shop and have him point it out to me,
> but until then I was hoping someone could help me identify in the Bentley
> manual which pipes are considered to be the #1 and #3 pipes.
>
> Thanks,
>
> Steve
>
> 89 Westy
>