Hi folks,
I am in the process of fitting a complete Mk2.5 system to my 1994 Eunos starting from the manifold, I cut out the nasty join where the first pipes come together, they were squashed and welded up reducing the pipe diameter by 2/3,
I then welded a plate over the section so that should now flow really well, the mid section is mx parts with cat, I am going to fit a sportex straight through back box,
I will have to make up one new exhaust hanger to bolt onto the rear subframe.
I have exhaust wrapped the manifold and first section including the cat and painted it to seal the wrap.
The Mk2.5 system has gentler bends in it which should help flow, the only downside is the cat is further forward so a bit of extra heat shield protection is needed.
Yes I know its unothodox but it has to be tried.
The Mk2.5 Manifold is a very good design for an OEM part.