SPL Parts Front Spherical Caster Rod Bushing Set

2017–2021 BMW 230i xDrive (F22/F23)

Part #: SPL CRBN F3IX

Overview

The SPL Parts FKS Series Front Caster Rod Bushings (CRBN) are designed to enhance the handling and steering precision of your BMW 230i xDrive. Specifically engineered for the 2017 to 2021 models, these bushings replace the factory rubber components with high-performance spherical bearings, delivering a significant upgrade in suspension responsiveness. Whether you're a spirited street driver, a track enthusiast, or someone seeking improved stability, these bushings are an excellent choice to optimize your vehicle's suspension geometry and overall driving experience.

By replacing the stock flexible bushings with low-friction, articulating spherical bearings, you'll notice more direct steering feedback, reduced bushing deflection under load, and improved braking stability. This upgrade helps maintain precise suspension alignment during aggressive driving, resulting in better handling, reduced body roll, and enhanced driver confidence. Designed with durability in mind, these bushings are built to withstand the rigors of spirited driving while providing consistent performance over time.

Key Features

The SPL Parts FKS Series Bushings incorporate several advanced features that set them apart from standard components:

• Constructed with massive 1" FK Racing Bearings featuring self-lubricating Teflon liners, these spherical bearings minimize friction and ensure smooth articulation under load.
• Made from high-quality 6061-T6 aluminum, the bearing housings are lightweight yet robust, providing excellent durability and resistance to corrosion.
• Designed to replace the factory rubber bushings, these spherical bearings eliminate bushing deflection, maintaining optimal suspension geometry during aggressive driving or cornering.
• The low-friction design reduces unwanted suspension movement, translating to sharper steering response and more predictable handling feedback.
• Precision CNC-machined for a perfect fit, ensuring straightforward installation and long-lasting performance.
• Ideal for enthusiasts who want to improve their vehicle's handling characteristics without sacrificing daily drivability.
• Engineered to withstand the demands of high-performance driving, offering a reliable upgrade for both street and track use.
• Enhances braking feedback by reducing suspension flex, contributing to more confident stopping power.
• Designed with minimal maintenance requirements, thanks to the self-lubricating Teflon liners in the FK bearings.

Construction & Design

The SPL Parts CRBN bushings feature a meticulously engineered design that combines strength, precision, and longevity. The core of each bushing is a massive 1" FK Racing spherical bearing, crafted from high-grade materials to resist wear and deformation. The bearing is housed within a lightweight, CNC-machined 6061-T6 aluminum shell, which provides excellent structural integrity while keeping weight to a minimum. The use of high-quality materials ensures resistance to corrosion and environmental factors, making these bushings suitable for both street and track environments.

The spherical bearing design allows for free articulation, eliminating the deflection and compliance associated with rubber bushings. This results in a more direct transfer of steering inputs and suspension forces, enhancing overall handling precision. The self-lubricating Teflon liners within the FK bearings reduce friction and maintenance needs, ensuring smooth operation over the lifespan of the bushings. The entire assembly is precision CNC-machined for a perfect fit, simplifying installation and ensuring consistent performance.

Installation & Fitment

The SPL Parts CRBN bushings are designed as a direct bolt-on upgrade for the 2017-2021 BMW 230i xDrive (F22/F23). Installation typically involves removing the existing factory bushings and replacing them with these spherical bearing units. The process may require basic tools and mechanical knowledge; however, no cutting, drilling, or complex modifications are necessary. For optimal results, professional installation is recommended to ensure proper alignment and torque specifications are met. Once installed, these bushings provide a secure, performance-oriented upgrade that enhances your vehicle's handling characteristics.

What's Included

• Set of front spherical caster rod bushings with FK Racing bearings
• High-quality CNC-machined 6061-T6 aluminum housings
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• BMW enthusiasts seeking improved steering response and handling
• Track day drivers aiming for better suspension stability
• Performance-oriented street drivers wanting precise suspension geometry
• Owners looking for durable, long-lasting suspension upgrades