Really easy and no drilling required!!!.You remove the top bolt on the bonnet hinge,and put it back on along with 2 x washers and the fixing plate (in the required hole,there's 3 but its trial/error)and for the bottom you remove the middle bolt thats holding the wing down and replace it with a ball type bolt.Theres a little wire catch on either end of the damper,take it off put dampre in place and re-fit the catches- very easy to install.