95 850 exhaust manifold

[etzal]

I need to replace the exhaust manifold which has started leaking and getting louder every day.
The manifold is the early version and connects to the catalytic using 2 springs and 2 bolts.
The catalytic may be need to be replaced as well.
It has only one O2 sensor.

Is it possible to fit the newer version of manifold with the flex joint and 4 bolt flange?
What would be the part number of the catalytic?
When I search the online parts stores there are restrictions on fitment:
For example automatics trans or with EGR or for engine numbers < or > 58599 (where is this nr?).

The car is 95 850 GLT non-turbo non-EGR with 5sp manual trans.

[tryingbe]

There is probably nothing wrong with the exhaust manifold.

Check exhaust back pressure before replacing the catalytic converter.