This rod-end upgrade kit is applicable for all 2005 - Current Ford F250 & F350 4X4 trucks that currently utilize our #6-4030 adjustable pan-rod bar. The rod end does not allow the front end to shudder from left to right like a traditional bushing can. The rod-end allows for more side to side precision of the front axle housing and eliminates "Death Wobble". Only applicable on the #6-4030 Pan-Rod Bar