I did not already have LEDs. Just Halogen. The info below is from one of the sponsors (allmoparparts) on this forum. Mine is a 23 and did not need anything other than the Mopar LED headlights as per below for JLs and JTs. You should be good to go since you have a 21 without anything but the...
The harness that plugs into the headlight should have 4 wires, one of which is just for the halo at least on my 23. I am not sure which one is the halo, but there should be a ground, hot wire for high beam, hot wire for low beam and hot wire for the halo. Mine only needed the headlights and to...
Assuming the bushings aren't shot, The control arms are a bit longer and adjust the caster a bit which does make a difference with the steering. I installed them a couple years ago. There are lots of others that have done so as well. If you search here you will find lots of threads about...
Just enter old and new tire/wheel setup and you can see how much you will have using this calculator. I put those wheels on my stock Rubicon and had about 1.5" of poke. https://tiresize.com/wheel-offset-calculator/
Easy fix. I just loosened the hinge bolts, had the wife lift the edge of the door that aligns with the sticker properly and retighten. 10 minutes at most.
I'm happy doing it. Here is more info on the subject. https://www.jeepgladiatorforum.com/forum/threads/stock-lcas-to-mopar-extended-lcas-caster-change.99026/
I am running LT315/70R17 (35x12.5) BF Goodrich K02 on
Mopar Wheel 17" x 8" Rubicon Extreme Recons, , Backspacing of 4.4" (+12mm offset) which gave me almost 2" of poke. I added the Mopar fender extensions which equaled the poke.
You dont have to have the Tazer. You just need to turn on the Aux switches in the trucks computer which can be done with JSCAN. Just like if you added the OEM Aux switches. Check the install videos on Youtube for the Automotive Aux switch kit.
I added the Mopar performance LCAs to stock Rubicon and got 1 degree of Caster. See my alignment data sheets in this thread. https://www.jeepgladiatorforum.com/forum/threads/stock-lcas-to-mopar-extended-lcas-caster-change.99026/
If you don't have the Aux switches from the factory, I do not believe you get those two "extra" wires. You can add the OEM Aux switch kit that has the 4 wires under the hood and also at the passenger side firewall area like the factory installed version, but it does not include those two wires...