Steve,

The pipes are usually referred to as front, back, and collector.
The front pipe is for cylinder 1 and 3
The back pipe is for cylinder 2 and 4
The collector takes the output of both the above and sends it to the cat.

Looks like you need only one pipe replaced, the one getting cylinder 1 and 3??

Eric
p.s. I don't have bentley here, so it could be the reverse: front for 2 and
4, back for 1 and 3....sorry for the confusion!

At 10:38 99-08-23 -0700, Steve Macaulay wrote:
>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
>
>