Whiteline Rear Upper Control Arm Bushings

1986–1991 Mazda RX-7

Part #: KCA379

Overview

The Whiteline Rear Upper Control Arm Bushings are designed to enhance the handling and stability of your Mazda RX-7 from 1986 to 1991. These high-performance polyurethane bushings replace the factory rubber components, providing a more direct and responsive connection between your suspension components. Whether you're a spirited driver, a track enthusiast, or someone looking to improve daily driving confidence, these bushings help support increased handling precision and reduced suspension deflection.

Whiteline is renowned for its focus on delivering quality suspension solutions that maximize performance without sacrificing everyday comfort. These control arm bushings are an excellent upgrade for those seeking to improve camber control, reduce unwanted movement, and achieve a more planted feel during cornering and spirited driving.

Key Features

Designed with performance and durability in mind, the Whiteline Rear Upper Control Arm Bushings feature several key attributes:

• Constructed from high-quality polyurethane material that offers superior durability and resistance to wear compared to OEM rubber bushings.
• Precisely engineered to restore and improve camber alignment, aiding in handling and tire wear consistency.
• Reduces suspension flex and deflection, resulting in more predictable steering response and improved cornering grip.
• Easy to install as direct replacements for factory bushings, with no need for additional modifications or specialized tools.
• Manufactured by Whiteline, a trusted name in performance suspension components, ensuring reliable quality and performance.
• Designed to withstand harsh driving conditions, including aggressive cornering and track use, without degrading or losing performance.
• Helps support a more aggressive stance and improved handling characteristics, especially when combined with other suspension upgrades.

Construction & Design

The Whiteline KCA379 bushings are crafted from premium polyurethane, which strikes an ideal balance between stiffness and flexibility. This material resists compression and deformation over time, maintaining optimal camber correction and suspension geometry. The bushings are precision-molded to ensure a perfect fit and consistent performance, featuring a one-piece design that simplifies installation and enhances durability. Their robust construction helps reduce unwanted suspension movement, providing a more responsive and confident driving experience.

Installation & Fitment

The Whiteline Rear Upper Control Arm Bushings are designed as bolt-on replacements for the factory bushings, making installation straightforward for those with basic suspension knowledge. No cutting, drilling, or complex modifications are required. It is recommended to use proper suspension tools and follow the manufacturer's installation instructions for optimal results. For best performance, consider aligning your vehicle after installation to maximize camber correction benefits.

• Direct replacement for factory bushings
• No additional modifications needed
• Installation typically requires standard suspension tools

What's Included

• Pair of polyurethane rear upper control arm bushings
• Installation hardware and instructions

Ideal For

This product is ideal for Mazda RX-7 owners looking to improve handling, camber control, and suspension responsiveness. Perfect for enthusiasts who participate in spirited driving, track days, or those seeking a more precise and confident driving experience during daily use.