SPL Parts FKS Series Front Spherical Caster Rod Bushing Set

2017–2020 BMW 440i Gran Coupe (F36)

Part #: SPL CRBN F3IX

Overview

The SPL Parts FKS Series Front Spherical Caster Rod Bushing Set is designed to enhance the handling and steering precision of your BMW 440i Gran Coupe (F36) from 2017 to 2020. These high-performance bushings replace the factory rubber components with low-friction, articulating spherical bearings, providing a significant upgrade in suspension response. Whether you're a spirited street driver, a track enthusiast, or someone looking to improve your vehicle's handling characteristics, this set offers a reliable solution to reduce bushing deflection and maintain optimal suspension geometry under load.

By upgrading to these spherical bushings, you'll experience more direct steering feedback, improved turn-in response, and enhanced stability during aggressive driving. The design ensures that your vehicle's suspension remains precise and predictable, helping you achieve better control and confidence behind the wheel. Crafted with durability and performance in mind, these bushings are ideal for those seeking a more responsive and engaging driving experience without sacrificing everyday comfort.

Key Features

The SPL Parts FKS Series Bushings incorporate several advanced features to maximize performance and longevity:

• Massive 1" FK Racing Bearings with self-lubricating Teflon liners provide low friction articulation, ensuring smooth movement and reducing wear over time.
• Constructed from high-quality 6061-T6 aluminum, these bushings offer excellent strength and corrosion resistance, making them suitable for both street and track use.
• Designed to replace the stock flexible rubber bushings, these spherical bearings eliminate bushing deflection, maintaining consistent suspension geometry under load for improved handling feedback.
• The low friction design helps reduce binding and allows for more precise steering response, especially during aggressive maneuvers.
• Engineered for durability, these bushings withstand the rigors of spirited driving and track conditions, providing long-lasting performance.
• Easy bolt-on installation with no need for complex modifications, making them a practical upgrade for enthusiasts and professionals alike.
• Optimized for maintaining factory ride quality while delivering noticeable improvements in handling and steering feel.

Construction & Design

The SPL Parts FKS Series Bushings are meticulously engineered with a focus on performance and durability. The core components feature high-grade 6061-T6 aluminum housings that are CNC-machined for precise fitment and consistent quality. The spherical bearings are constructed with 1" FK Racing Bearings, which are known for their exceptional strength and low friction properties. The self-lubricating Teflon liners inside the bearings ensure smooth articulation and reduce maintenance needs.

The design eliminates the rubber bushings' inherent flex and deflection, providing a more direct connection between suspension components. This results in improved steering response, better feedback, and enhanced stability during cornering. The use of high-quality materials and precision manufacturing ensures that these bushings can withstand the demands of aggressive driving while maintaining their performance over time.

Installation & Fitment

The SPL Parts FKS Series Bushings are designed as a direct bolt-on upgrade for the front caster rods on your BMW 440i Gran Coupe (F36) from 2017 to 2020. Installation typically requires basic hand tools and some mechanical knowledge; however, no cutting, drilling, or complex modifications are necessary. Proper alignment after installation is recommended to ensure optimal suspension geometry and handling performance. The process is straightforward for experienced enthusiasts and professional technicians alike, making this upgrade accessible for most DIYers.

• Easy bolt-on installation with factory mounting points
• No cutting, drilling, or tuning required
• Includes all necessary hardware and components for a complete upgrade

What's Included

• Front Spherical Caster Rod Bushings (pair)
• High-quality FK Racing Bearings (1")
• 6061-T6 Aluminum housings
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• Enthusiasts seeking improved steering response and handling
• Track day drivers aiming for more precise suspension control
• Street drivers wanting a more connected and confident driving experience
• BMW owners looking to upgrade suspension components for better durability and performance