BMW E46 M3 came into us with a tapping noise, we diagnosed it as worn rockers.

In the photo you can see how much the old rocker had worn against the new one.

Surprisingly the Schrick rockers were better value than the BMW items, so while we were there we also fitted a pair of Schrick cams, new head gasket and a remap to suit. It now sounds awesome and we have a very happy customer.