So I took off the heat shield from the cat and did the jubilee clip mod to the manifold down pipe, I'm still getting a little rattle at 3000k ......to put my mind at rest, I'm no engine guru, but do the cams switch over at a certain rev? It's a 1.3 sr....? It does this at a standstill or going along... Any ideas appreciated cheers , it's hardly anything but just a little annoying as not noticed it before mainly cos it's summer and now driving with windows down. Thanks