Toyota Supra MK4 JZA80 2JZGTE 93-00 - Adjustable Rear Upper Control Arms

Maintaining optimal rear suspension geometry is crucial for performance and tyre life, particularly when modifying a Toyota Supra MKIV (JZA80). These adjustable rear upper control arms are designed to address the challenges presented by lowered ride heights, wider wheel/tyre combinations, and increased demands on handling characteristics. Incorrect camber settings can lead to uneven tyre wear, reduced grip, and compromised stability – these arms provide the necessary adjustment range to fine-tune your Supra’s alignment for peak performance.

When lowering a vehicle or installing aftermarket wheels with altered offsets, the factory suspension geometry is often disrupted. This frequently results in negative camber gain during compression, reducing contact patch and ultimately diminishing grip. Conversely, insufficient negative camber can limit cornering potential by not maximising tyre engagement when the car rolls through turns. These adjustable arms allow precise correction of rear camber to optimise handling characteristics for both road and track use.

The principle behind adjusting camber revolves around ensuring the tyres are perpendicular (or slightly angled inwards) to the road surface under load. Static camber, set while the vehicle is stationary, compensates for changes in suspension geometry during cornering. By dialling in the correct amount of negative camber, you ensure that as the car leans into a turn, the tyre maintains maximum contact with the asphalt, maximising grip and improving responsiveness.

Key Features & Construction

• Material: Constructed from high-tensile steel for exceptional strength and durability. This ensures these control arms can withstand the stresses associated with spirited driving and demanding track conditions. The selected steel grade offers a superior balance of rigidity and weight, contributing to overall vehicle performance.
• Welding Process: MIG welded construction provides consistent, strong, and reliable joints throughout the arm’s structure. MIG welding ensures deep penetration and minimal porosity, resulting in a robust component capable of handling significant loads.
• Pillowball Joints: Equipped with heavy-duty pillowball joints (spherical bearings). These joints eliminate deflection under load, providing precise steering response and improved suspension feel. Pillowball joints offer superior articulation compared to traditional rubber bushings, translating directly into more predictable handling characteristics.
• Corrosion Resistance: Finished with a durable powder coat to protect against corrosion from road salt, moisture, and other environmental factors. This extends the lifespan of the control arms and maintains their aesthetic appeal.
• Direct Bolt-On Fitment: Designed as a direct replacement for factory upper control arms, requiring no modifications or fabrication for installation. This simplifies the upgrade process and minimises downtime.
• Adjustment Range: Offers an adjustment range of up to -3° (negative) to +3° (positive) relative to standard ride height. This wide range allows for precise tuning to accommodate a variety of wheel/tyre setups and driving styles. It’s important to note that achieving the full adjustment range may depend on existing suspension modifications and vehicle condition.

Understanding Camber Adjustment:

• Negative Camber: Tilting the top of the tyre inwards. Increases grip during cornering but can cause increased wear on the inside edge of the tyre if excessive.
• Positive Camber: Tilting the top of the tyre outwards. Can improve straight-line stability but reduces cornering grip.

Installation Notes: After installation, a professional wheel alignment is essential to ensure correct geometry and optimal handling. It’s recommended to have the alignment checked periodically, especially after track days or significant driving events.

These adjustable rear upper control arms are an essential upgrade for any Supra owner looking to maximise their vehicle's performance potential and maintain proper suspension geometry with modified setups. They provide the necessary tools to fine-tune camber settings, optimise tyre wear, and unlock improved handling characteristics on both road and track.

Compatibility: Specifically designed for Toyota Supra MKIV (JZA80) models manufactured between 1993 and 2000 equipped with the 2JZGTE engine. Please verify your vehicle’s specifications before ordering.