SPC Adjustable Upper Control Arms for 2003-2024 Toyota 4Runner

Part: 35480
Includes: Pair of adjustable upper control arms

These SPC Performance adjustable upper control arms are engineered to correct alignment geometry on lifted Toyota FJ Cruisers and 4Runners while increasing suspension travel, improving handling, and maximizing tire clearance. Built from forged steel and assembled in Colorado, they are designed for demanding off-road use without sacrificing factory ride quality.

When these vehicles are lifted, factory caster and camber angles shift outside optimal ranges. This commonly results in wandering steering, poor return-to-center, uneven tire wear, and reduced high-speed stability. SPC upper control arms restore proper alignment by adding built-in positive caster and additional adjustment range, allowing the tire to be correctly centered in the wheel well.

Control Arm Design and Performance

• Forged steel construction for maximum strength and durability
• Built-in positive caster correction for lifted vehicles
• Improved clearance around the spring bucket
• Allows forward tire placement to improve clearance for larger tires
• Compatible with knuckle gusset kits due to extended ball joint threads

Ball Joint and Bushing Technology

SPC uses a sealed, maintenance-free ball joint and xAxis flex joint system to balance articulation, durability, and ride quality.

• Ball joint stud is 25 percent larger than OE for increased strength
• E-Nickel coating for superior corrosion resistance
• Fully sealed architecture keeps contaminants out
• One-piece polymer race ensures quiet, smooth operation
• Up to 80 degrees of ball joint articulation
• xAxis sealed flex joints in bonded rubber bushings for improved NVH control

Alignment Adjustment Range

• Camber: ±2.00 degrees
• Caster: 0.00 to +4.00 degrees

The combined adjustment range of these arms and the factory lower control arm cams allows alignment correction for lifted vehicles while making it possible to move the tire forward. This significantly improves clearance for up to 33 inch tires without requiring frame or fender modifications.

Fitment Notes

 

• Fits Toyota 4Runner 2003-2024
• Sold as a pair
• One set required per axle
• If replacement lower adjustment cams are needed, use SPC part #25440 or #25435 depending on model year

Patent: US Patent No. 7,513,514

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Frequently Asked Questions

Why do lifted 4Runners and FJ Cruisers need adjustable upper control arms?
Lifting these vehicles reduces caster and camber, leading to wandering steering and uneven tire wear. Adjustable upper control arms restore proper alignment and improve stability.

Will these arms improve tire clearance?
Yes. These arms allow the tire to be moved forward in the wheel well, improving clearance for up to 33 inch tires without cutting or trimming.

Are these control arms maintenance-free?
Yes. The sealed ball joint and xAxis flex joints do not require greasing.

Do these arms affect ride quality?
No. The bonded rubber bushings and sealed joints are designed to maintain factory ride quality while allowing increased suspension articulation.

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Installation Instructions:

Download SPC 35480 Installation Guide (PDF)

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