Nope. Us 4.8is-ers don't need them.

So if I install the rb kit and the leman special edition flare kit, do I don't even touch the flares and leave the ones out from the rb kit?

Why? because of tire size?

I got a 3.0 with 315 35 20 in the rear and thought to put 25mm spacers on because of the leman special edition flares.

How do I put the leman flares on with the RB kit, the same way

Help!!!!

I'm stuck. I started following the instructions, but I have the running board kit with the leman special edition flares. the little piece that is at the rear (the one that is rounded instead of squared like the 4.8is) how do I attached that to my 3.0 rear bumper???

My flare kit didn't have any instructions.

Show a pic. I need to see it to check mine.