I recently installed this kit. I didn't have to notch anything. They tell you to lift the hub/a-arm assembly slightly from full drop to make sure the boots clear the frame & a-arm before you drill the hole & mount the bracket. Do this & check for clearances & you should be fine. I never had any issues.
2017 Teryx4 base model turned beast model
2.5" Highlifter lift kit
28x10 Super atv Intimidator tires on 14x7 MSA Vibe wheels
Brute Performance LED headlights with Auxbeam LED spotlights front & rear
Boss reflex 46 overhead stereo mounted under a ghetto roof
Superwinch 4,500lb winch