That was the 1st start in a few weeks, we took the pcv system off and de-gunked it. We could barely push a needle through what was meant to be a 8-10mm pipe!!! The manifold we know has a big blow but the sound at the end is what worries me the most when the camera is down at floor level. Could the dual mass shear and make a racket like that? Or more likely the bottom end?
Its really hard to determine with a loud blowy manifold though..