2002 wrx exhaust leak question
 

I HAVE 2002 WRX, I AM PRETTY SURE THE EXHAUST AT THE TURBO IS BLOWING, MY QUESTION IS :

IS THERE ANY USUAL WEAK POINTS THERE AS ITS COVERED BY HEAT SHIELD AND I CANT FEEL THE BLOW, I HAVE BEEN TOLD THERE IS A UP CAT THERE WHICH IS FLEXI, & CAN BLOW ?? IS THAT CORRECT?

IF IT IS THE UP CAT I WILL REPLACE WITH UP CAT DE CAT, WILL THIS IMPROVE POWER SLIGHTLY WITHOUT NEED TO RE MAP