SPL Parts FKS Series Front Spherical Caster Rod Bushing Set

2013–2016 BMW 328i / 335i (F30/F31) 3.0L Turbocharged

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 F30/F31 chassis. Replacing the factory rubber bushings with high-performance spherical bearings, this set provides a more direct and responsive connection between your suspension components. Whether you're a spirited street driver or an enthusiast seeking improved track performance, these bushings help maintain optimal suspension geometry under load, resulting in sharper steering feedback and better overall control.

Constructed with durability and performance in mind, this bushing set is ideal for those looking to eliminate bushing deflection and reduce friction in the front suspension. The result is improved braking stability, more predictable handling, and enhanced feedback during aggressive driving. Designed specifically for the 2013-2016 BMW 3 Series (F30/F31), these bushings are a perfect upgrade for enthusiasts who want to maximize their vehicle's handling capabilities without sacrificing everyday drivability.

Key Features

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

• High-quality FK Racing spherical bearings with massive 1" diameter FK bearings ensure maximum load capacity and longevity.
• Self-lubricating Teflon liners within the bearings reduce friction and eliminate the need for regular maintenance, providing consistent performance over time.
• 6061-T6 aluminum bearing housings offer a lightweight yet robust structure that withstands harsh driving conditions and resist corrosion.
• Designed with precision CNC machining to ensure perfect fitment and alignment, maintaining factory suspension geometry or improving upon it for enhanced handling.
• Eliminates bushing deflection common with rubber mounts, providing a more direct transfer of steering inputs and suspension forces.
• Constructed to withstand the rigors of aggressive driving, track use, or spirited street driving, ensuring long-lasting performance.
• Reduces unwanted suspension flex, helping to maintain consistent alignment settings and tire contact patch during cornering.
• Compatible with stock suspension components, making installation straightforward without the need for additional modifications.

Construction & Design

The SPL Parts FKS Series Bushings are engineered with a focus on durability and performance. The spherical bearings are crafted from high-grade FK Racing components, featuring a 1" diameter for exceptional load handling. The self-lubricating Teflon liners inside the bearings minimize friction and wear, ensuring smooth operation and reducing maintenance needs. The aluminum housings are CNC-machined from 6061-T6 aluminum, known for its strength-to-weight ratio and corrosion resistance, providing a lightweight yet sturdy support structure.

The design eliminates the flexibility of rubber bushings, which can compress and cause vague steering feel. Instead, these spherical bearings provide a solid, direct connection that improves steering response and handling precision. The components are engineered to fit precisely within the factory mounting points, ensuring a seamless upgrade that maintains the integrity of your vehicle's suspension geometry.

Installation & Fitment

The SPL Parts FKS Series Bushings are designed as a direct bolt-on upgrade for the front caster rods on the 2013-2016 BMW 328i and 335i (F30/F31). Installation typically requires basic hand tools and can be completed with standard suspension service procedures. No cutting, drilling, or complex modifications are necessary. For optimal results, professional alignment is recommended after installation to ensure proper suspension geometry and tire wear.

• Easy bolt-on installation using factory mounting points
• No cutting, drilling, or special tuning required
• Suitable for street, track, and spirited driving applications

What's Included

• Front Spherical Caster Rod Bushing Set with FK Racing Bearings
• Aluminum bearing housings
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• BMW enthusiasts seeking improved steering response and handling
• Track day and autocross participants
• Owners looking to eliminate suspension flex and bushing deflection
• Drivers who want a more connected and precise driving experience