NEW BILLET UPPER CONTROL ARMS
No squeaks, no maintenance, no headaches.
SHOP NEW BILLET UCA
ENGINEERED FOR STRENGTH, STYLE, AND SILENCE.
Whether you’re daily driving, overlanding, rock crawling, or chasing desert trails, these arms handle it all. Billet Upper Control Arms (UCAs) are precision-machined from 6061 aluminum, offering exceptional strength and a refined appearance. Billet UCAs feature Probearing heavy duty ball joints — these joints aren't OE replacements, they're purpose-built for off-road performance to deliver superior articulation and durability. Alongside these joints, SilentSpin™ bushings eliminate grease and squeaks. That means a quiet ride, zero maintenance, and no grease gun. We proudly design and preassemble them in the USA.
PRECISION MACHINED
CNC-machined from 6061 aluminum for unmatched strength.
HEAVY DUTY BALL JOINTS
Probearing joints built for extreme off-road articulation.
SILENTSPIN™ BUSHINGS
No grease, no squeaks just smooth, quiet performance.
QUIET RIDE ZERO MAINTENANCE
No grease, no squeaks just smooth, quiet performance.
4130 Tubular UCA
Dirt King 4130 Upper Control Arms – Built to Solve Real Problems
If you’re ready to upgrade your suspension, these 4130 UCAs are for you. We made them to tackle the exact issues we kept running into ourselves—squeaky bushings, joints that need constant attention, and geometry thrown off as soon as you add a lift. Whether you’re daily driving, overlanding, rock crawling, or chasing desert trails, these UCAs handle it all.
SHOP 4130 TUBULAR UCA
IT'S NOT THEORY. IT'S PROVEN. PROBEARING™ HEAVY-DUTY BALL JOINTS ARE TESTED TO 1 MILLION CYCLES.
Built from Race-Proven 4130 Chromoly
Delivers exceptional strength and durability while remaining lightweight for aggressive off-road performance.
Precision-Machined Billet Strength
Crafted from aerospace-grade 6061 billet aluminum for exceptional durability, reduced weight, and a premium finish that stands up to the toughest trails.
Optimized Suspension Geometry
Corrects suspension geometry for 0–3" lift kits while adding approximately 1" of extra down travel, improving wheel travel, handling, and overall off-road capability.
Fully Adjustable for Peak Performance
Features an adjustable inner pivot system for precise camber and caster tuning, maximizing suspension travel, steering precision, and tire alignment on lifted trucks.
A STATEMENT IN CRAFTSMANSHIP
A premium upgrade over OEM control arms, featuring maintenance-free SilentSpin™ bushings and a fully rebuildable design for lasting performance.
4130 Chromoly Construction
Precision-welded 4130 chromoly tubing delivers exceptional strength for daily driving, overlanding, crawling, and desert use.
Geometry Corrected
Optimized caster and pivot angles maintain proper alignment with up to 3" of lift.
6061 Billet Aluminum
Precision-machined from aerospace-grade 6061 aluminum for exceptional strength and premium styling.
ADJUSTABLE CAMBER & CASTER
Exclusive inner pivot system allows precise alignment adjustments for optimized handling.
Pro 4 Ball Joints
Forged SAE4140 construction with 76° of articulation for superior strength and smooth steering.
More Down Travel
Adds approximately 1" of suspension droop over stock for improved off-road performance.
Heavy Duty Pro bearing Ball Joints
Designed for maximum durability and dependable performance in demanding environments.
Increased Suspension Travel
Engineered to maximize lift and front suspension travel when paired with Dirt King shocks.
