Have 1993 Micra need help!!!

i doubt it can be done unless you change the total system from the manifold/engine back, i had a 93 without and a 94 with, different down pipe i believe, look on euro carparts and you should see the different types
 
It may be an easier job to fit a manifold cat instead?

It's whether the manifold cat would then marry up with the existing exhaust. If it did then that would be much easier. If not, you're probably looking at replacing the whole exhaust unless you're a dab hand with an angle grinder and a welder
 
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