2005 Impreza WRX STI
where the cat goes up into the back of the engine (manifold) u attach the cat with two nuts and theres some sprong type things there. has anyone had a problem with these before? i fitted my de cat AGAIN and at quite high revs it seems to make a high pitched sort of mtal on metal squeel! i took it to a local garage and they had a quick look and thought it could be them? id this common?