I recently got a 2.5'' pro comp leveling kit installed on my 06 trx4 and the bump stops that were installed already have grooves worn into them where the upper control arms are hitting them. There is very little clearance between the a arms and bump stops, like less than 1/4''. Any suggestions on whats goin on, im thinking 4wheelparts installed the bumpstops too high...

 

It's because of the lift.....mine bumps as well.

 

has it done any damage to your suspension, seems like it cut a little groove in the bumpstop, but it isnt goin any deeper than what it already is..