decat alfa 147 jtd 16v

i looking at decating the car has anyone done this before to a 147 . Then i was going to get it remap again. The parts are am looking at get removerd are the pre cat and the main cat so the new pipe would be from turbo back i got a novitec middle box and rear box all ready on the car and an uprated clutch has been fit when the q2 diff was fitted

No point of installing middle box. Just replace it with straight pipe!

On mine I have done the following:

Removing of both pre.cat and main one...replace the main one with straight pipe and a Free-flow back box at the end.

Then you need a BMC-CDA at the front and maybe FMIC....

Then get e new remap.

who make the pre cat one you got

The pre.cat is the difficult part. You have to remove it from the car, then open it from one side (don't cut the whole thing, just on one side make a square cut to open it)....like a brain surgery, then get rid of the catalytic converter inside and then welded it back again...

Basically you are using your pre.cat..but you are just removing the catalytic converter inside it.