I feel that my t2 is a little bit loud and i would like to tone it down a bit. Where would be a good spot to install a presilencer without removing the cat converter??

when i mean by a presilencer is an actual presilencer (the muffler looks alike) and not a plug (looks alike) at your muffler tip.

 

after the cat before the muffler is where mine is.

 

I think people have used a Borla XR-1 muffler as a silencer with good effect.