SPL Parts Front Spherical Caster Rod Bushing Set

2017–2019 BMW 330i xDrive (F30/F31)

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 330i xDrive from 2017 to 2019. These bushings replace the stock flexible rubber components with high-performance spherical bearings, providing a more direct and responsive connection between your suspension and chassis. Whether you're a spirited driver, track enthusiast, or simply seeking improved driving feedback, these bushings deliver noticeable improvements in handling dynamics.

Engineered for enthusiasts who demand maximum control and durability, the SPL CRBN bushings help eliminate bushing deflection under load, maintaining optimal suspension geometry during aggressive driving. This results in sharper turn-in, reduced understeer, and more predictable steering response, making your driving experience more engaging and confident.

Key Features

The SPL Parts FKS Series Bushings incorporate advanced materials and precise engineering to deliver superior performance and longevity. Key features include:

• Constructed from high-grade 6061-T6 aluminum, ensuring strength and corrosion resistance for long-lasting durability in demanding conditions.
• Massive 1" FK Racing spherical bearings with self-lubricating Teflon liners provide low friction articulation, reducing binding and allowing for smooth suspension movement.
• Elimination of rubber bushings replaces compliance with rigid spherical bearings, resulting in more precise suspension geometry and improved handling feedback.
• Designed specifically for the front caster rods of the BMW F30/F31 chassis, ensuring a perfect fit and straightforward installation.
• Reduces bushing deflection under load, helping maintain proper alignment and suspension geometry during spirited driving or track use.
• Enhances steering response and feedback, giving you more confidence in aggressive maneuvers.
• Manufactured with precision CNC machining for consistent quality and fitment.
• Ideal for performance-oriented street driving, autocross, or track days where handling precision is paramount.

Construction & Design

The SPL CRBN bushings feature a robust design centered around high-quality 6061-T6 aluminum housings that securely hold the FK Racing spherical bearings. The bearings themselves are engineered with self-lubricating Teflon liners, which minimize maintenance and ensure consistent performance over time. The spherical bearing design allows for multi-directional articulation, reducing unwanted deflection and providing a more direct transfer of steering inputs to the wheels.

The use of CNC machining ensures precise tolerances and a perfect fit for the front caster rods of the BMW F30/F31 chassis. The lightweight aluminum construction not only contributes to overall vehicle weight reduction but also helps dissipate heat generated during aggressive driving, maintaining optimal bearing performance. The design emphasizes durability, with corrosion-resistant finishes to withstand the elements and road debris.

Installation & Fitment

The SPL Parts FKS Series Bushings are designed as direct bolt-on replacements for the front caster rods on the BMW F30/F31 chassis from 2017 to 2019. Installation is straightforward for those with basic mechanical skills and the proper tools, typically requiring standard hand tools and a lift or jack stands. No cutting, drilling, or complex modifications are necessary. Proper torque specifications should be followed to ensure optimal performance and longevity.

• Direct bolt-on installation with no modifications required.
• Compatible with OEM suspension components and settings.
• Recommended to have the vehicle aligned after installation to maximize handling benefits.

What's Included

• Set of SPL Parts FKS Series Front Spherical Caster Rod Bushings (CRBN)
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• Performance enthusiasts seeking sharper handling and steering response
• Track day and autocross drivers aiming to improve suspension precision
• Owners looking to eliminate bushing deflection for consistent alignment during aggressive driving