Hardrace Rear Upper Camber Kit – Nissan Z & Infiniti G-Chassis (8739)

Product Overview

When you drop the ride height on Nissan’s multi-link FM chassis architecture using performance lowering springs or track-spec coilovers, the rear suspension naturally slips into excessive, unmanageable negative camber. Because the factory eccentric adjustment bolts provide an extremely narrow sweep, lowered cars are left trapped with a highly compromised tire contact patch—leading to erratic drift transitions, poor straight-line traction, and rapidly ruined tire treads.

The Hardrace Rear Upper Camber Kit (8739) is an elite, motorsport-tier suspension upgrade engineered to solve this exact mechanical bottleneck. Available at JDMaster.net, this heavy-duty 2-piece rear upper control arm package features premium, race-proven pillow ball (spherical) bearings rather than traditional rubber or polyurethane inserts. Designed specifically for high-performance rear-wheel-drive Nissan Z platforms (Z33, Z34, and the latest R324/RZ34 400Z) along with Infiniti G-series sport models, the 8739 kit delivers an impressive ±2∘ adjustment window, giving you the power to dial in the perfect alignment footprint for the street, drag strip, or drift track.

Key Features & Benefits

• Motorsport Spherical Pillow Ball Bearings: Equipped with high-load, anti-dust shielded metal spherical joints. They wipe out structural deflection entirely for instant, direct steering response and immediate rear-axle feedback.

• Broad ±2∘ Adjustment Sweep: Provides a wide turnbuckle modification range ($286.5\text{mm}$ to $321.5\text{mm}$ total length), making it easy to fix aggressive suspension drops or dial in specific track setups.

• Heavy-Gauge Structural Steel Body: Engineered from thick-walled, one-piece stamped steel alloy to deliver maximum structural integrity and prevent arm bending under hard drifting or high-G track cornering.

• Locks In Axle Traction & Even Tire Wear: Restores a completely flat, optimized tire contact footprint across the tarmac to prevent costly inner-edge tire cording and maximize forward bite.

• Electrophoretic Deposition (ED) Finish: Coated in Hardrace’s signature dark blue, industrial-grade ED protective anti-rust layer to actively repel track debris, moisture, and road grime.

• Flawless OEM Fitment Geometry: CAD-profiled to perfectly replace the factory non-adjustable rear upper links, hooking cleanly into the original chassis subframe mounts and rear wheel knuckles.

Technical Specifications

Applications

Nissan Z-Chassis Performance Cars

• Nissan 350Z (Z33 Chassis — 2002–2008 Fairlady Z)

• Nissan 370Z (Z34 Chassis — 2008–2021 Fairlady Z)

• Nissan Z (RZ34 / 7th Gen Chassis — 2022–Present Twin-Turbo 400Z)

Nissan Skyline & Infiniti Luxury Sport Platforms

• Infiniti G35 Coupe & Sedan (V35 Chassis — 2002–2006)

• Infiniti G25 / G35 / G37 (V36 Chassis — 2006–2014)

• Nissan Skyline Coupe & Sedan (V35 / V36 JDM Markets — 2002–2014)

The Mechanical Advantage: Spherical Bearings vs. Rubber Deflection

On Nissan’s FM (Front Midship) chassis platform, the rear upper camber link carries massive lateral load spikes when diving into sharp corners or when snapping the car sideways into a drift. Factory rubber bushings—and even basic aftermarket polyurethane upgrades—suffer from “bushing deflection.” Under heavy lateral forces, the soft material deforms inside its housing, causing your rear alignment angles to shift wildly mid-corner. This often manifests as a vague, unpredictable handling sensation right at the limit of grip.

The Hardrace 8739 kit solves this issue by utilizing professional, steel-on-steel spherical pillow ball joints. Because there is no soft material to compress, your alignment settings remain perfectly rigid under load. This direct mechanical link forces your rear tires to track exactly how you want them to, giving you total confidence through clipping points.

Build Note: While spherical bearings provide unmatched precision for competitive driving, they are highly rigid and can transfer some additional high-frequency road texture and mechanical NVH (Noise, Vibration, and Harshness) into the car’s interior compared to soft rubber arms.

Professional Workshop Fitting & Safety Advice

Alignment & Installation Protocol: Altering the physical length of your rear upper camber link shifts both your rear toe settings and the overall dynamic track width. Because of this, a comprehensive, professional four-wheel laser alignment is strictly required immediately following installation.

Attempting to drive without a fresh alignment will cause severe handling imbalances, trigger traction control interventions, and cause rapid tire scrubbing. For maximum performance and peace of mind, you can book an installation and chassis setup session at our fully equipped JDMaster.net workshop, where our technicians specialize in custom wheel alignments for street, drift, and time-attack setups.

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.