tip seems fine and all clips etc are tight, only dodgy one is the 1 near the turbo inlet which links to the pvc system, however i think this is sound, will a faulty amp bring up a fault code
cant remember what plugs, bosch ones, looked them up in there manual, but found out when i got home that they wr 0.1 mm of a difference, as i said its been fine, might put the old ones bk in to rule them out