[TR] TR4A exhaust to TR4

[carlsereda]

Hi Earl,
Moss sells a version of the so-called Y PIPE in 2 pieces as apposed to 
the original 1-piece design. I think this may better suite your 
situation in getting around through tight spaces by allowing another 
point where you can turn/adjust the connector pipe (which was 
previously welded to the Y collector). The original 1-piece Y PIPE was 
for a TR4A frame and the TR4 frame is quite different, plus your added 
variable of a different tranny could make for a trickier path. A few 
years back only MossUK sold the 2-piece Y PIPE but now I believe you 
can get it from MossUS. The TR4A improved exhaust manifold was 
actually the second half of the improved TR breathing system. The 
first half was the late TR4 intake manifold. There is no fitting 
problems using a 'late' TR4 intake with the TR4A exhaust manifold. And 
together was said to be worth 4 horsepower.
Regards,
Carl
'63 TR4 since '74

> 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