Processing 1.3 mjt ex 69cv

Hi to all, for various reasons, was that not writing in the forum, and I now return it for a question on a type of processing that I would like to carry on my point. I have a 3 series (188, the so-called fanalona) 1.3 multijet at the start was 69 hp, now with a step made has 150 hp ( kw 130hp, map, turbine, 1446. My intention now is to make a change to mount a double turbo. But being a 1.3 multijet I have no ideas where to start from, but especially if you can. I look forward to your help 😁😁 thanks in advance 😘😘

I don't know if the exhaust gases of the 1.3 mjt able to move easily 2 turbo without difficulty,would it not be more appropriate to replace one with a greater air flow?

I think that will be a little difficult to fit a double turbine, you should change the cylinder head with the exhaust plus...

Even as the spaces on the engine compartment I think that you are very limited