4Runner 2025-2026 Toyota 4WD B8 Pro Upper Control Arms by Bilstein

The Bilstein 51-333416 B8 Pro Upper Control Arm Kit for 2025-up Toyota 4Runner models is a premium suspension upgrade that improves caster geometry, suspension travel, steering feel, and stability in lifted applications. The kit includes a pair of heavy-duty tubular upper control arms made from 4130 chromoly steel, with high-strength ball joints, maintenance-free pivot bushings, mounting hardware, and installation instructions. A durable black powder-coated finish resists corrosion while giving the control arms a clean, performance-focused look.

Bilstein B8 Pro Control Arms are engineered to correct caster geometry after increasing ride height, helping improve straight-line stability and overall handling. The tubular 4130 chromoly construction adds strength for demanding street and off-road use, while the revised control arm geometry works with lifted suspension systems to maintain more favorable front-end alignment. This geometry-focused design makes the 51-333416 a strong complement to upgraded shocks, coilovers, and leveling systems.

Maintenance-free inner pivot bushings use a composite-lined, double-bonded urethane design with free-spinning inner sleeves for low-friction movement without routine greasing. This bushing configuration lets the suspension cycle smoothly while reducing the maintenance typically required for traditional aftermarket control arm bushings. At the outer pivots, high-strength 4140 steel sealed ball joints provide more articulation than factory components, supporting additional suspension travel while maintaining smooth, controlled steering.

The 51-333416 arrives as a complete upper control arm pair with the ball joints and bushings already installed, simplifying installation and providing a ready-to-install suspension upgrade. By combining chromoly tubular construction, corrected caster geometry, low-friction, maintenance-free bushings, and increased-articulation ball joints, the B8 Pro Control Arm Kit improves durability, suspension movement, and handling for lifted Toyota 4Runner builds on pavement or off-road terrain.

Features & Benefits

• Designed for 2025-up Toyota 4Runner models
• Bilstein B8 Pro upper control arm kit improves suspension geometry on lifted applications
• Corrected caster geometry helps improve straight-line stability and handling
• Heavy-duty tubular control arms are constructed from 4130 chromoly steel
• Black powder-coated finish provides corrosion resistance and durability
• High-strength 4140 steel ball joints provide increased articulation
• Increased ball joint articulation supports additional suspension travel
• Sealed ball joint construction reduces maintenance requirements
• Maintenance-free inner pivot bushings eliminate the need for routine greasing
• Composite-lined double-bonded urethane bushings provide low-friction suspension movement
• Free-spinning inner sleeves support smooth control arm articulation
• Low-friction bushing design helps reduce binding throughout suspension travel
• Designed to improve steering feel and suspension response on lifted vehicles
• Complements Bilstein shocks, coilovers, and other lifted suspension systems
• Includes driver-side and passenger-side upper control arms
• Ball joints and bushings arrive preinstalled
• Includes mounting hardware and installation instructions
• Backed by Bilstein's Limited Lifetime Warranty