LAT Tri-Y Down Pipes

Steel

As I understand it they will be mild steel. The project has started as a members motor Dan is building with several guys expressing interest as well myself included , Kevin, and others. It is a group buy and not a retail club venture as I understand it may be able to make in S.S. as well .
 
A bit of a delay

The buy/sell has been delayed, but still planned.
 
NEWS

Believe it or not, there has been some progress on the Down pipe front!

Some pipes were bought and a set of down pipes made.

Things were learned!

1) The original planned parts were not enough.

2) The original planned parts were not quite right.


The main challenge for me was my Right side down pipe was modified quite a bit for

clearance for a bigger bellhousing/flywheel (from the "STD" 157 tooth to the 164 tooth flywheel).

After a closer look at an NOS Right side, the left side is quite different.

The right side curves away from the engine quite a bit to clear the starter.

If you have the original Tri-Y manifolds, the pair with a bigger angle away from the engine go on the right side.

If you have the Repro Manifolds, they are MOSTLY the same, but not 100%, selectively check the fit (and mark them).


Now here is the important part of THIS post, it's been so long from the start of this project,

I MAY have forgotten some WHO were on the LIST!



So I am starting over with a new list.

PM me to get on the list.

DW
 
Subscribe

Some may have selected on the drop down to subscribe to this thread, I doubt it though. I'm wondering when this will be a parts for sale thread too but it's certainly easier to find here in this stock section. I'm interested but needed for many are the cast hanger and the manifolds themselves. I have a set of the EM castings but no hanger .
This is a great project and since I'm a long way from needing a set of Dan's pipes it's always that do I buy it while it's available and wait or take risk of waiting. I will forward the link to the page to the guys I talked about with this. It'll be interesting to see if unobtainium parts prices slide in line with the car prices...
 
There may be pictures of original Tri-Y down pipes on the forum somewhere, but this is a good place for some more:

From the Mulvey collection, an NOS set!

Starting with the more complicated right side.

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Very nice, I'm getting ready to build a set, we were wondering if there is some additional numbers cast just past the letter 'R'. Maybe a date code?
 
Nice pics. I believe they were only marked HSC 1.
The flanges on those original pipes are pretty thin, I would suggest the new ones be made with thicker flanges, those originals would be prone to leaking. Of course if you want them concours, you would need the thin ones.

David
 
I know some time has passed since this post…I am in need of the tri-y down pipes, any options, I have the flanges. Thanks for any leads, Joe
 
I have them on my MKI and went through the ordeal of piecing a set together. As rare as the manifolds and motor mount hangers are, finding a good pair of down pipes is much more of a challenge or next to impossible. If you can live with having something other than original parts, I suggest finding a muffler shop that can fabricate some for you. It's not a terribly difficult job for an experienced custom exhaust guy.
I found someone local to me and am very happy with his work.

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If one was making their own , is there any benefit to modifying the rear downpipe so that it curves forward a bit and kicks out a bit so that it can be the same length as the front downpipe?
 
There might be but as you know with Tigers, space is never plentiful. The motor mount is in between the two downpipes so very little room there. I think any attempt to get the lengths equal would mean a less than smooth passage offsetting any gains.
 
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