SPL Parts Front Spherical Caster Rod Bushing Set

2017–2021 BMW 230i (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. Specifically engineered for the F22 and F23 models from 2017 to 2021, these bushings replace the factory rubber components with high-performance spherical bearings. This upgrade is ideal for enthusiasts seeking improved suspension response, reduced bushing deflection, and a more direct connection between your vehicle's chassis and suspension components.

Whether you're a spirited driver, a track enthusiast, or someone looking to improve everyday driving feedback, these spherical bushings help maintain optimal suspension geometry under load. By eliminating the flex inherent in stock rubber bushings, you'll experience sharper turn-in, better steering feel, and enhanced overall handling. The result is a more confident driving experience with improved feedback during aggressive maneuvers or spirited driving sessions.

Key Features

The SPL Parts FKS Series Bushings incorporate several advanced features to deliver maximum performance and durability:

• Constructed from high-quality 6061-T6 aluminum, these bushings provide a lightweight yet robust housing that withstands the rigors of high-performance driving.
• Massive 1" FK Racing spherical bearings with self-lubricating Teflon liners replace the stock flexible rubber bushings, offering low friction articulation and consistent performance over time.
• The spherical design eliminates bushing deflection, ensuring that your suspension geometry remains stable under load, which translates to improved handling and braking feedback.
• Designed with precision CNC machining, these bushings feature a perfect fit for the F22/F23 chassis, ensuring straightforward installation without modifications.
• Enhanced durability and resistance to wear make these bushings suitable for both street and track use, providing long-lasting performance even under demanding conditions.
• Improved articulation helps support more aggressive camber and caster settings, allowing for fine-tuning of your suspension setup.
• Self-lubricating liners reduce maintenance needs and ensure smooth operation over the lifespan of the bushings.

Construction & Design

The SPL Parts CRBN bushings are meticulously engineered using high-grade materials to ensure durability and precise fitment. The aluminum housing is CNC-machined from 6061-T6 aluminum, known for its strength-to-weight ratio and corrosion resistance. The spherical FK Racing bearings are designed with a 1" diameter, providing a large contact area for smooth articulation and minimal play.

The self-lubricating Teflon liners inside the bearings reduce friction and eliminate the need for regular greasing, making maintenance straightforward. The design ensures that the bushings can withstand high loads and harsh driving conditions while maintaining consistent performance. The overall construction promotes a more responsive suspension system, translating to improved handling characteristics and driver confidence.

Performance & Handling

Upgrading to SPL Parts' spherical caster rod bushings significantly enhances your vehicle's handling dynamics. By replacing the stock rubber bushings with high-performance spherical bearings, you'll notice more precise steering response and reduced bushing flex during aggressive driving. This translates into better turn-in, more predictable handling, and improved feedback from the front suspension.

While these bushings are primarily designed for performance driving, they also contribute to a more direct and engaging driving experience in everyday use. The reduction in bushing deflection helps maintain proper suspension geometry, which can positively impact braking stability and overall vehicle control.

Installation & Fitment

The SPL Parts CRBN bushings are designed as a direct bolt-on upgrade for the 2017–2021 BMW 230i (F22/F23). Installation involves removing the existing factory bushings and replacing them with the spherical bearing units. No cutting, drilling, or extensive modifications are required, making this a straightforward upgrade for those familiar with suspension work. Basic hand tools and alignment adjustments are recommended to ensure optimal setup after installation.

• Direct bolt-in replacement for factory caster rod bushings
• No cutting or drilling required
• Installation time varies depending on experience but generally can be completed within a few hours

What's Included

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

Ideal For

• Performance enthusiasts seeking sharper handling and steering response
• Track day drivers aiming for improved suspension stability
• Owners looking to upgrade their BMW's suspension for better feedback and control
• Anyone wanting to eliminate bushing flex and maintain optimal suspension geometry under load