Fitting tips: Place the fender extension from above onto the fender (item 50783-XX), temporarily secure with adhesive tape and mark the drill holes. Remove the fender extension and drill the 10 holes with a 4 mm wood drill. Replace the extension, starting with the front two holes: Fit blind rivets with washer, insert from the top and add washer at the bottom. Tighten the rivets piece by piece and check the fit of the lower washer. Work from the front to the back.