SPL Parts Adjustable Front Caster Rod Bushings

Part #: SPL CRB E9X

Overview

The SPL Parts FKS Series Adjustable Front Caster Rod Bushings are high-performance suspension components designed specifically for the BMW M4 (F82/F83) from 2014 to 2023. These bushings replace the factory rubber bushings with precision-engineered spherical bearings, providing a significant upgrade in suspension response and handling consistency. Crafted for enthusiasts and professional tuners alike, these bushings help maintain optimal suspension geometry under load, resulting in improved steering feedback, braking stability, and overall handling precision. Whether you're tracking your vehicle or seeking a more responsive street ride, these bushings are engineered to support your performance goals with durability and reliability.

Key Features

Designed with performance and durability in mind, these bushings feature massive 1" FK Racing Bearings with self-lubricating Teflon liners, ensuring long-lasting operation and minimal maintenance. The CNC-machined offset bearing spacer allows for precise adjustment of caster angle, enabling fine-tuning of your vehicle’s handling characteristics. The low-friction spherical bearings eliminate bushing deflection and reduce friction, providing a more direct and predictable steering feel. Constructed from high-quality materials, these bushings are built to withstand the rigors of aggressive driving and track use, offering both strength and longevity.

Construction & Design

The bushings incorporate CNC-machined aluminum spacers and high-grade spherical bearings, designed to provide a secure fit and consistent performance. The use of Teflon-lined FK bearings ensures smooth articulation and resistance to wear, even under demanding conditions. The precise machining and robust materials contribute to a lightweight yet durable assembly, optimized for high-performance suspension tuning.

Driving Feel & Feedback

These adjustable caster rod bushings enhance steering responsiveness and feedback, giving you more confidence during aggressive driving or cornering. By reducing bushing deflection, they deliver a more direct connection between the steering wheel and the wheels, improving overall handling precision and driver engagement.

Installation & Fitment

Installation requires basic suspension tools and should be performed by those familiar with suspension components. Proper alignment after installation is recommended to ensure optimal handling characteristics and caster adjustment. Fitment is designed specifically for the BMW M4 (F82/F83) models from 2014 to 2023; verify compatibility with your vehicle before purchase.

What’s Included

The package includes the adjustable front caster rod bushings, CNC-machined spacers, spherical bearings, and all necessary hardware for installation.