i put on the 4" shackles i had josh at inchworm gear make and i am very happy with how it sits. it fixed my caster problem and realized the camber problem was actually the toe of the tires. with the caster so far back the tires looked \----/ but with the correct caster the toe was way off. tires were facing away from each other. i no longer get a wobble and it steers alot better. it also handles the bumps better.