Peak Chromoly Upper Control Arms – Heavy-Duty Suspension Upgrade – 19+ Silverado/Sierra 1500/ZR2/AT4X

When lifting your vehicle, factory upper control arms often become a limiting factor. The stock UCAs are prone to over-articulation, which compromises geometry, reduces overall strength, and accelerates wear on joints. Our Peak Chromoly Upper Control Arms are engineered to correct alignment, increase suspension durability, and deliver improved performance for both daily driving and extreme off-road use.

Corrected Geometry & Improved Handling

These arms are designed with increased caster and optimized pivot angles, reducing stress on suspension joints and restoring proper alignment after a lift. This leads to better high-speed stability, sharper steering response, and improved handling across all terrains.

ProBearing Ball Joint for Strength & Articulation

To eliminate the weak OEM ball joint, we’ve integrated a ProBearing High Angle Ball Joint, which provides superior articulation and durability as well as limited maintenance. Whether tackling rock gardens, technical trails, or highway miles, the uniball ensures smoother suspension travel and confidence under load.

Heavy-Duty Bushings & Hardware

At the inner pivots, we use precision-machined ProBearing SilentSpin Bushings for a maintenance free experience.  To further increase durability, all washers and sleeves are zinc-plated for corrosion resistance, and the arms are finished in our Peak signature powdercoat.

Built for a Lifetime of Use

Every component of these UCAs is rebuildable or replaceable, ensuring long-term service life. Each set arrives preassembled for a hassle-free install and includes detailed instructions. For added support, an installation video is available on our YouTube channel.

What’s in the Box:

• (2) Chromoly Upper Control Arms

• (2) ProBearing SilentSpin Bushings

• (4) Washers

• (2) 1” ProBearing High Angle Ball Joint (installed)

• (Durable) Peak Signature Powdercoat

• (2) Machined Caps