Does anybody know how the nuts are fixed on the inside and do you have to remove the original spoiler to replace them?
The nylon bolts screw into small plates, which are bonded to the inside of the original spoiler. If it’s only the outermost bits (ie furthest from the tow eye), that are knackered, you should be able to get at them by removing/flexing the wheelarch liner. Other than that, it’s removal of the original spoiler.