SPL Parts FKS Series Front Spherical Caster Rod Bushing Set

2015–2016 BMW 428i Gran Coupe (F36) / 2013–2015 BMW 335i (F30) 2.0L Turbo

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. Specifically engineered for the 2015–2016 BMW 428i Gran Coupe (F36) and the 2013–2015 BMW 335i (F30), this set replaces the factory rubber bushings with high-performance spherical bearings. Whether you're a spirited street driver, a track enthusiast, or someone seeking improved suspension response, these bushings deliver superior articulation and stability.

By upgrading to these spherical bushings, you'll experience more direct feedback from your suspension, reduced deflection under load, and consistent geometry during aggressive driving. This results in sharper turn-in, improved braking stability, and enhanced overall handling characteristics, making your vehicle more responsive and predictable on the road or track.

Key Features

The SPL Parts FKS Series bushings incorporate advanced materials and precision engineering to maximize performance and durability. Key features include:

• Massive 1" FK Racing Bearings with self-lubricating Teflon liners for maximum low friction articulation and long-lasting performance.
• Constructed from high-grade 6061-T6 aluminum, ensuring lightweight strength and corrosion resistance.
• Replace the stock flexible rubber bushings with low friction, articulating spherical bearings that eliminate bushing deflection.
• Designed to maintain optimal suspension geometry under load, improving handling feedback and braking response.
• Precision CNC-machined components for perfect fitment and consistent performance.
• Engineered for durability and reliability in demanding driving conditions, including spirited street driving and track use.

Construction & Design

The SPL Parts FKS Series bushings feature a robust design centered around high-quality spherical bearings housed within lightweight, CNC-machined aluminum brackets. The use of 6061-T6 aluminum provides a perfect balance of strength and weight savings, reducing unsprung mass for improved suspension dynamics. The massive 1" FK Racing Bearings are equipped with self-lubricating Teflon liners, which significantly reduce friction and wear, ensuring smooth operation over countless miles and aggressive driving sessions. The articulation provided by these spherical bearings helps maintain precise suspension geometry, even under high loads, resulting in consistent handling and feedback.

The design eliminates the deflection and compliance inherent in rubber bushings, allowing for more direct transfer of steering inputs and better control. The high-quality materials and meticulous manufacturing process ensure these bushings withstand the rigors of performance driving while maintaining long-term durability.

Installation & Fitment

The SPL Parts FKS Series bushings are designed as direct bolt-on replacements for the factory caster rod bushings. Installation typically requires basic hand tools and a lift or jack stands. No cutting, drilling, or complex modifications are necessary, making it a straightforward upgrade for those familiar with suspension work. Proper alignment is recommended after installation to ensure optimal handling and tire wear. The set is engineered to fit perfectly within the factory mounting points, providing a secure and precise fitment.

• Easy bolt-on installation with standard hand tools
• No cutting or drilling required
• Suitable for street and track use

What's Included

• Set of spherical caster rod bushings with FK Racing Bearings
• High-grade aluminum brackets
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• BMW enthusiasts seeking improved suspension response
• Track day drivers aiming for sharper handling
• Street drivers wanting more precise steering feedback
• Owners looking to replace worn or flexible factory bushings