Right so, the rear join with the welded gaskets just before the back box actually moves (they will slide slightly with not too much force so clearly are not air tight!) so through my mechanical expertise I have decided that is where the noise is coming from.
The system is 7 years old and has done 46k miles, the front of the system including the Y section seems to be in decent shape, the rear is a bit rusty looking but also seems to have its integrity still. Just that weld that has gone to s**t.
Does anyone think I should try and get the join welded again with some new gaskets or replace back section with OEM / scorpion?
I'm not into serious mods yet but wouldn't mind a bit more of a cheeky sound which I hear the scorpion might provide, is it mainly the post Y section of the exhaust that produces most of the sound or is it the whole exhaust system from front to back?