Hardrace Rear Upper Camber Kit – Toyota & Lexus (7540)

Product Overview

The Hardrace Rear Upper Camber Kit (7540) is a premium, motorsport-grade alignment correction solution. Available at JDMaster.net, this heavy-duty 2-piece rear upper control arm kit completely replaces your unadjustable factory stamped links. Pre-assembled with Hardrace’s professional shielded pillow ball (spherical) bearings, this kit delivers the precise physical adjustability needed to dial your alignment back to factory parameters or set up custom track-day specs. By wiping out the soft, flexing characteristics of aging OEM rubber joints, the 7540 kit provides instant chassis feedback and razor-sharp handling dynamics without compromising structural durability.

Key Features & Benefits

• Motorsport-Spec Pillow Ball Bearings: Pre-installed with high-load, steel-on-steel spherical pillow ball joints covered by protective rubber anti-dust boots. They eliminate arm deflection under load for instantaneous rear-axle feedback and direct power delivery.

• On-Car Camber Adjustment: Built with an integrated heavy-duty threaded adjustment mechanism, allowing alignment technicians to smoothly fine-tune rear camber angles while mounted to the vehicle.

• One-Piece Heavy-Gauge Forged Construction: Engineered with a rugged, structural layout modeled after original equipment profiles but reinforced to resist chassis twist and high lateral flexing forces.

• Maximizes Rear Tire Footprint: Straightens the rear tire layout to distribute load evenly across the entire tread surface, restoring rear-wheel-drive traction and extending tire life.

• Advanced ED Anti-Corrosion Shielding: Treated with an industrial-tier Electrophoretic Deposition (ED) base coating and specialized paint layers to reject road moisture, grime, salt, and track debris.

• Direct Bolt-In Blueprint: Precision CNC-machined mounting points guarantee a flawless physical swap with your vehicle’s factory crossmember frames and rear upright knuckles.

Technical Specifications

Applications

Lexus Performance Platforms

• Lexus IS200 / IS300 (1st Gen) — 1999–2005 Sedan & SportCross Wagon (XE10 / GXE10 / JCE10)

• Lexus GS300 / GS400 / GS430 (2nd Gen) — 1998–2005 Executive Sport Sedan (JZS160 / UZS160)

• Lexus SC430 (2nd Gen) — 2001–2010 V8 Convertible Coupe (UZZ40)

Toyota JDM Icons

• Toyota Altezza / Altezza Gita — 1998–2005 RS200 & AS300 Platforms (SXE10 / GXE10 / JCE10)

• Toyota Aristo (2nd Gen) — 1997–2004 Twin-Turbo & N/A Cruisers (JZS160 / JZS161 V300)

• Toyota Crown / Crown Majesta (11th Gen) — 1999–2007 Luxury VIP Platforms (S170 / JZS171 / UZS170)

The Mechanical Advantage: Zero-Deflection Spherical Bearings

On platforms like the Lexus IS300 and GS300, the rear upper control arm is a vital structural member that bears heavy lateral stress loads during aggressive cornering or high-angle drift entries. Standard factory arms use soft rubber bushings that deform significantly when pushed to the limit. This bushing deflection causes your camber and toe angles to constantly drift mid-corner, creating an unpredictable, disconnected feeling at the rear end of your vehicle.

The Hardrace 7540 kit eliminates this mechanical bottleneck by using solid spherical pillow ball joints. Because there is no soft rubber or flexible polyurethane to compress, your suspension links maintain their exact dimensions under heavy load. This direct steel-on-steel connection ensures your alignment settings remain rock-solid, delivering a crisp, communicative chassis feel that tells you exactly how much traction your rear tires have left.

Professional Workshop Fitting & Safety Advice

Installation Note: Because adjusting the length of the rear upper control arm immediately changes the rear toe settings and dynamic steering angles of your vehicle, a comprehensive, professional four-wheel laser alignment is strictly mandatory following installation.

Driving your vehicle without a precise laser alignment can trigger unexpected vehicle stability control (VSC) interventions, compromise vehicle safety, and result in immediate tire cording. For maximum safety and optimal performance, book a suspension installation and chassis geometry setup appointment at our fully equipped JDMaster.net workshop, where our technicians specialize in custom alignments for street and circuit configurations.

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.