my mate fit them to his glanza as the bonnet flew up on the motor way, luckily didnt cause alot of damage, just bent the bonnet and hinges, luckily again he had a spare with hinges in the garage haha I think they do come with a cutting template like matt has said above but meant to still be a right bitch, only cutting through the top skin to make them sit snuk, but like matt has said, start small and work your way out testing each time, youll be fine, dremil will be the best tool mate