Will this scrape the group if yalls lowering Springs are installed ?
No it will not. Our lowering springs gives a modest drop. Nothing too extreme.
Lazy question... but can I install these any way without removing the wheels?
You can, but it's kind of a pain in the rear.
Are these as flexible as Rally Armor UR mudflaps?
The flaps are made from urethane and are very flexible. We have not done a side by side comparison with the rallyarmor flaps to see which one is more flexible but they should be similar.