Fabtech uniball upper control arms for 2015–2018 Ford F-150 4WD are heavy-duty 4130 chromoly arms designed for 0–6 in. lift systems. They replace factory ball-joint arms with stainless PTFE-lined uniballs, add caster for better on-road behavior with oversized tires, and use durable frame-side urethane bushings to reduce noise. These arms are built for longevity in rugged off-road conditions.
Fabtech 15-18 Ford F150 4WD 4130 Chromoly Steel UCA 0-6in Lift System - Component Box