SPL Parts Front Spherical Caster Rod Bushing Set

2017–2020 BMW 430i Gran Coupe (F36)

Part #: SPL CRBN F3IX

Overview

The SPL Parts FKS Series Front Caster Rod Bushings (CRBN) are designed to upgrade your BMW 430i Gran Coupe (F36) from the factory rubber bushings to high-performance spherical bearings. These bushings are engineered to enhance your vehicle's suspension precision, handling, and responsiveness, making them an ideal choice for enthusiasts and spirited drivers who demand more from their BMW's chassis.

Replacing the stock flexible bushings with low-friction, articulating spherical bearings eliminates bushing deflection and reduces friction under load. This results in more consistent suspension geometry, improved steering feedback, and sharper handling characteristics. Whether you're tracking your vehicle or simply seeking a more engaging driving experience on the street, these bushings help maintain optimal alignment and suspension performance.

Key Features

Designed for maximum performance and durability, the SPL Parts FKS Series Bushings incorporate several advanced features:

• Massive 1" FK Racing Bearings with self-lubricating Teflon liners provide smooth articulation and long-lasting performance, reducing wear and maintaining optimal movement over time.
• Constructed from high-quality 6061-T6 aluminum, these bushings offer a lightweight yet robust housing that withstands the rigors of aggressive driving and track use.
• Articulating spherical bearings replace the stock rubber bushings, significantly reducing deflection and providing a more direct connection between suspension components.
• Designed with precise engineering to maintain suspension geometry under load, helping improve braking stability and handling feedback.
• Corrosion-resistant finishes ensure longevity and reliable performance in various driving conditions.

Construction & Design

The SPL Parts CRBN bushings feature a high-strength 6061-T6 aluminum housing that is CNC-machined for perfect fitment and consistent quality. The core of each bushing is a 1" FK Racing spherical bearing, which offers superior articulation compared to traditional rubber or polyurethane bushings. The self-lubricating Teflon liners within the bearings minimize maintenance and prevent squeaks or binding over time.

This combination of materials and design choices ensures that your suspension maintains its intended geometry, even during aggressive cornering or heavy load conditions. The spherical bearings are engineered to withstand the stresses of performance driving, providing a stable and predictable feel at the wheel.

Performance & Handling

By replacing the stock bushings with these spherical bearings, you'll notice an immediate improvement in steering response and overall handling. The reduction in bushing deflection means your suspension reacts more directly to driver inputs, translating to more precise cornering and better feedback. This upgrade supports increased driver confidence and can contribute to improved lap times on the track.

While primarily focused on performance, these bushings also help support consistent suspension geometry, which can positively influence braking performance and stability during high-speed maneuvers.

Installation & Fitment

The SPL Parts CRBN bushings are designed as direct bolt-on replacements for the factory caster rod bushings on the 2017-2020 BMW 430i Gran Coupe (F36). Installation typically requires basic hand tools and some suspension disassembly. Due to their precise engineering, no additional modifications, cutting, or drilling are necessary. It is recommended to follow proper suspension alignment procedures after installation to ensure optimal handling characteristics.

Professional installation is recommended for best results, especially to ensure correct torque specifications and alignment settings.

What's Included

• Pair of SPL Parts FKS Series Front Caster Rod Bushings (CRBN)
• High-quality FK Racing spherical bearings
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• Performance enthusiasts seeking improved handling and steering response
• Track day drivers aiming for more precise suspension control
• BMW owners looking to upgrade factory suspension components for better durability and performance
• Anyone wanting to reduce bushing deflection and maintain optimal suspension geometry under load