Yep you are correct, there is some debate over which system from the
manifold back was installed on IRS cars vs. solid axle cars. Most of the
literature that I saw during the 70's said that the single muffler system
was installed on IRS cars however mine has always had the 3 muffler dual
outlet system installed. (It's a 66 that I bought in 69 with about 18,000
miles on it). I believe that the parts books had it bassakwards at least at
the aftermarket parts levels. My OE parts manual only shows the 3 muffler
two outlet system however and no mention of the single muffler outlet system
at all.
To your point the manifold was changed to a dual system which was supposed
to aid the exhaust flow at the introduction of 4A cars.
But so what, right!
JVV
----- Original Message -----
From: "Randall Young" <ryoung@navcomtech.com>
Cc: "Triumphs" <triumphs@autox.team.net>
Sent: Thursday, February 26, 2004 1:29 PM
Subject: RE: TR4/TR4A Question
> Didn't the switch to the dual outlet exhaust manifold also happen at the
> 4/4A changeover ? ISTR the routing changed with the 4A frame, so the
entire
> exhaust system was different.
>
> Randall
|