Front Upper Control Arm with Ball Joint Assembly Pair

High-Performance Suspension Restoration for Toyota Supra and Lexus SC

Restore the legendary handling and steering precision of your vehicle with this 2-Piece Front Upper Control Arm and Ball Joint Set. Specifically engineered for the Toyota A80 and Lexus Z30 chassis, these control arms are essential for maintaining correct camber and caster geometry. Over decades of use, the factory rubber bushings perish and the integrated ball joints develop internal play, leading to "clunking" noises, steering wander at high speeds, and uneven tire wear.

This kit provides a comprehensive bolt-on solution for both the driver and passenger sides. Each arm comes pre-assembled with heavy-duty bushings and precision-machined ball joints, eliminating the need for specialized pressing tools or complex shop labor. Manufactured from high-strength steel and finished with a durable anti-corrosion coating, these arms are designed to handle the increased stresses of spirited driving and performance suspension setups.

Fitment Verification and Vehicle Applications

This pair is designed for the Front Upper positions (Left and Right sides) on the following models:

• Lexus SC300: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000.

• Lexus SC400: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000.

• Toyota Supra: 1993 (Specifically models with a production date From 5/01/93).

• Toyota Supra: 1994, 1995, 1996, 1997, 1998.

• Fitment Note: Compatible with both Naturally Aspirated and Twin-Turbo models. These arms maintain factory suspension geometry, making them ideal for stock restorations or as a reliable base for lowered vehicles.

Technical Specifications and Attributes

• Quantity: 2-Piece Set (Left and Right sides).

• Material: Heavy-Duty Steel for high structural integrity.

• Bushing Material: High-durometer rubber for a balance of comfort and road feel.

• Ball Joint Included: Yes (Integrated/Pre-installed).

• Finish: Protective Black Coating to prevent oxidation and rust.

• Fitment Type: Direct Replacement.

What’s in the Box

• (1) Front Driver Side (Left) Upper Control Arm with Ball Joint

• (1) Front Passenger Side (Right) Upper Control Arm with Ball Joint

• (2) Pre-installed Control Arm Bushings (Per Arm)

Industry Cross-Reference Numbers

• Toyota / Lexus: 48610-29046, 48630-29046, 48610-19025, 48630-19025

• MOOG: RK620659, RK620660

• Dorman: 520-443, 520-444

• ACDelco: 45D1390, 45D1391

• Mevotech Supreme: CMS9808, CMS9809

• Beck/Arnley: 101-4929, 101-4930

Installation and Technical Tips

• Production Date Check: For 1993 Toyota Supra owners, verify your vehicle's production date on the door jamb sticker. This kit is specifically for models produced after May 1st, 1993.

• The "Loaded" Torque Rule: To ensure the longevity of the new rubber bushings, do not perform the final torque on the inner pivot bolts while the car is hanging on jack stands. Lower the vehicle onto its wheels or support the lower control arm with a jack to simulate "ride height" before tightening. This prevents the rubber from being "pre-twisted," which causes rapid bushing failure.

• Inspect the Camber Bolts: While replacing the upper arms, inspect your lower eccentric camber bolts. On these chassis, they are prone to seizing. Lubricating them now will ensure your alignment technician can make the necessary adjustments easily.

• Mandatory Alignment: Any change to the upper control arm immediately affects your camber and toe-in settings. A professional four-wheel alignment is mandatory following installation to protect your tires and ensure the car tracks straight.