[TR] TR4 to TR4a exhaust manifold swap

[Randy&Val DeRuiter]

 HiHo Earl-



I've done that swap on my TR4.  The clearance is tight, especially with an
A-overdrive, but it bolted up with no modifications at all.  You need the
double downpipe from a TR4A-TR6, then the Y-pipe from a TR4A, and that will
mate to a TR3-4 rear exhaust setup.  The final tie-in is right where it needs
to be at the rear trans mount and in my case I could use the TR4 exhaust
hanger at that location.  Not sure I gained anything because of sticking with
the standard TR3-4 rear setup, but that's what I had at the time and it worked
fine.



Randy

64 TR4




> 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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