There seems to be a bad batch of MMC Stage 1 exhausts, several have cracked in the same place as yours, within a few miles. Others have done a lot of miles without problems. I would suggest you try and get Morgan to replace them under warranty as it is a known problem and your mileage is low, they should not fail with such little use. No doubt this will be a long drawn out process, as most warranty claims seem to be. There is a lot to be said for getting non standard parts from sources with a degree of quality control.
