It sounds like it coming from the join to the turbo on to the downpipe as if you have the bonnet open and put your ear to the scoop that cools the turbo then you can here it.....does this sound like that join

If so is there a gasket that is common to failing??? And is it a big job to take all the shields off to have a look??? I have a standard Cat downpipe by the way.

Logan

MY95 WRX

 

Could be.. lots of horrible little bolts to get the shield off..

It should then be obvious.. unlikely to be leaking unless it has been disturbed though in my opinion..

JGM