Hi i bought one decat up pipe 2" Diameter, is it too big?
My question is if with a little big up pipe will slow turbo spool, or give gains because i removed de cat?

 

slow spool down, get a 42mm sti or a classic up-pipe and do it properly as you will take it apart again when its no good

 

It spoll down even with cat off?
I did a mistake, i already bought one up pipe from ebay...

 

It would be much easier to answer your question if you told us what turbo you're running Nuno. If it's a TD04, yes, the 2" up-pipe is far too big. Any gain you make via the removal of the cat will probably be more than lost.

 

I´m runing with AndyForrest Hybrid TD04 19t tuned for 22 psi

 

In which case you should email Andy if you want a definitive answer, but I'd strongly suspect that an up-pipe that big will do more harm than good.