THey are bolt on for all non Blister fender Gen 2's, they are pocket style mounting so they bolt on from the outside not through the existing SR holes. My friend has no flares on his SR due to them being badly damaged offroad, with the flares off he was left with holes and now mud slings everywhere if he gets into mud. He wanted to be able to replace the flares but have them easily removable in for when he's rock crawling or wheeling trails with high potential for side damage.
We will drill new holes in his fenders, nutzert the holes and use stainless hardware to attach the new fender flares. He'll be able to remove them in probably less than 10 minutes with a screw gun. We are also probably going to cut his fenders up higher as well. I'll post pics.