Hardrace Rear Upper Arm / Camber Kit – Toyota Mark II

Hardrace Rear Upper Arm / Camber Kit – Toyota Mark II / Chaser JZX90 / JZX100 (7809)

Product Overview

The Toyota JZX-chassis family utilizes an advanced independent rear suspension design that delivers exceptional high-speed traction and drifting balance. However, when these vehicles are lowered on performance coilovers, the fixed factory rear upper control arms pull the top of the knuckle inward. This architecture results in aggressive, non-adjustable negative camber, which severely compromises your tire contact patch, accelerates inner tread wear, and reduces forward bite.

The Hardrace Rear Upper Camber Kit (7809) is a heavy-duty adjustable suspension solution engineered to restore total alignment authority to your chassis. Available at JDMaster.net, this premium 2-piece control arm kit replaces your non-adjustable factory upper rear arms with a fully adjustable turnbuckle setup. Pre-assembled with motorsport-grade spherical pillow ball bushings, this package completely eliminates pivot deflection under load, allowing you to square the rear tire footprint flat with the tarmac for maximizing cornering adhesion and straight-line acceleration.

Key Features & Benefits

• Precision Rear Camber Correction: Features a continuous, threaded center turnbuckle sleeve that allows technicians to seamlessly lengthen or shorten the arm to dial in perfect rear camber specifications.

• Motorsport Pillow Ball Bearings: Pre-assembled with high-hardness spherical metal joints rather than flexible rubber or polyurethane. This ensures absolute alignment tracking stability under intense cornering and high-torque drift transitions.

• Eliminates Dynamic Alignment Drift: Prevents the rear hub assembly from shifting or twisting laterally during aggressive power delivery, maintaining highly predictable breakaway limits.

• Heavy-Duty Solid Steel Structure: Fabricated as a reinforced, one-piece structural component that offers immense rigidity compared to the thin factory assemblies, assisting to reduce structural chassis twist and flex.

• Instant Mechanical Communication: Removing all bushing compliance creates a direct pathway between your rear subframe and the knuckles, delivering telepathic chassis feedback and razor-sharp steering response.

• Premium ED Anti-Corrosion Protection: Treated with Hardrace’s signature Electrophoretic Deposition (ED) base coating and industrial paint layers to resist moisture, stone chips, and track debris.

• Direct Bolt-On Configuration: Engineered to match original equipment installation tracks, packaging seamlessly with your OEM or aftermarket coilovers, subframe anchors, and hub assemblies.

Technical Specifications

Applications

• Toyota Mark II / Chaser / Cresta (1992–1996 — JZX90 / GX90 / LX90 / SX90 Chassis)

• Toyota Mark II / Chaser / Cresta (1996–2001 — JZX100 / GX100 / LX100 Chasis)

The Mechanical Advantage: Taming Lowered JZX Rear Geometry

When you drop a JZX90 or JZX100 on coilovers, the rear suspension travels upward into its natural operational stroke, drawing the fixed-length upper control arm inward. Because the factory suspension tracks offer very limited factory eccentric bolt range, standard methods cannot compensate for the resulting heavy negative camber tilt. When attempting to lay down power with high-horsepower turbocharged engines like the 1JZ-GTE, this angle lifts the outer half of your tire off the tarmac, severely limiting acceleration traction.

The Hardrace 7809 adjustable upper arms solve this geometric restriction entirely. By extending the turnbuckle, technicians can smoothly push the top of the rear knuckle back outward, restoring a full, flat tire contact patch. Combined with zero-clearance spherical pillow balls that replace flexible factory elements at the inner pivots, rear tracking remains completely locked under full power. The result is total control over your tire wear, increased high-speed highway tracking stability, and predictable side-grip transitions during drifting or circuit layout racing.

Professional Lift Installation & Alignment Notes

Technical Fitting Note: The Hardrace 7809 kit is an intense, track-focused suspension upgrade featuring solid metal spherical pillow ball bearings. Because these bearings lack the dampening compliance of soft rubber, a minor increase in mechanical feedback and road texture (NVH) will be transmitted into the vehicle cabin—the industry-standard trade-off for zero deflection and instantaneous rear-end track feedback.

Because this kit alters your vehicle’s rear alignment lines, track width, and rear steering toe parameters simultaneously, a professional four-wheel laser alignment is strictly mandatory immediately following installation. You can arrange a precision setup and tracking appointment at our fully equipped JDMaster.net workshop, where our technicians specialize in high-precision suspension indexing, geometry correction, and custom drift/circuit setup tracking.

Warranty

The warranty on Hardrace products depends on the type of product, with a minimum warranty period of 2 years. This warranty does not cover damage caused by a car crash, improper use, negligence or normal wear and tear.