[TR] TR4 to TR4a exhaust manifold swap

[Peter Fullam]

Hi Earl,

Years ago I put a 4A exhaust manifold on my 4. It bolts right up, but the #2
and #3 legs will interfere with the straight balance tube on the TR4 intake
manifold. The guy I bought the 4A manifold from had scarfed out clearances
in both manifolds to make them fit, and I had to do the same to my intake. I
used the 4A downpipe and Y pipe. It lasted for years, until the #4 leg broke
off. I went to a 4A intake manifold and a steel tube header.

Pete Fullam

-----Original Message-----
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of Earl Bowman
Sent: Monday, August 24, 2009 2:09 PM
To: triumphs at autox.team.net
Subject: [TR] TR4 to TR4a exhaust manifold swap

Hiho TR Neighbors,
Has  anyone done a swap of the TR4 exhaust manifold for the dual outlet TR4a
manifold?  My concern is routing the exhaust pipe through the center
cross-member behind my HVDA 5spd transmission conversion. Already tight
between the transmission and frame. Anyone BTDT? What parts were involved?
 
Earl
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