SPL Parts FKS Series Front Spherical Caster Rod Bushing Set

2017–2019 BMW 340i GT (F34) / 2013–2015 BMW 335i (F30) 3 Series

Part #: SPL CRBN F3IX

Overview

The SPL Parts FKS Series Front Spherical Caster Rod Bushing Set is designed to enhance the suspension performance of your BMW 340i GT (F34) and 335i (F30) models. Replacing the factory rubber bushings with high-performance spherical bearings, this kit provides a significant upgrade in handling, steering response, and overall driving feedback. Whether you're a spirited street driver, a track enthusiast, or someone seeking improved suspension precision, these bushings are engineered to deliver maximum performance and durability.

By eliminating bushing deflection and reducing friction, the SPL FKS Series bushings help maintain optimal suspension geometry under load, resulting in more predictable handling and improved braking stability. The use of high-quality materials and precision engineering ensures that your vehicle responds more directly to driver inputs, providing a more connected and confident driving experience.

Key Features

The SPL Parts FKS Series Front Spherical Caster Rod Bushing Set incorporates advanced design features to maximize performance and longevity:

• Constructed with massive 1" FK Racing Bearings featuring self-lubricating Teflon liners for smooth articulation and reduced maintenance.
• Made from durable 6061-T6 aluminum, ensuring lightweight strength and resistance to corrosion.
• Replaces the stock flexible rubber bushings with low-friction, articulating spherical bearings that eliminate bushing deflection under load.
• Designed to maintain precise suspension geometry, improving handling feedback and steering response.
• Optimized for aggressive driving, track days, and high-performance street use.
• Manufactured with CNC-machined components for exact fitment and consistent quality.
• Easy bolt-on installation with no modifications required, providing a direct upgrade over OEM parts.

Construction & Design

The SPL FKS Series bushings feature a robust construction combining CNC-machined 6061-T6 aluminum housings with high-grade FK Racing spherical bearings. The bearings are equipped with self-lubricating Teflon liners, which reduce friction and wear over time, ensuring long-lasting performance. The spherical design allows for full articulation, accommodating suspension movement while maintaining precise alignment. This combination of materials and engineering results in a lightweight, durable, and high-performance upgrade that withstands the rigors of spirited driving and track use.

Installation & Fitment

The SPL Parts FKS Series Front Spherical Caster Rod Bushing Set is a bolt-on upgrade that requires no cutting or drilling. Designed specifically for the 2017–2019 BMW 340i GT (F34) and 2013–2015 BMW 335i (F30), installation involves removing the existing bushings and replacing them with the new spherical bearings. Basic hand tools and alignment are recommended to ensure proper fitment and optimal suspension geometry. The process is straightforward for those familiar with suspension work, and detailed instructions are included to facilitate a smooth installation.

• Direct bolt-on replacement for factory bushings
• No modifications, cutting, or special tuning required
• Ideal for enthusiasts seeking improved handling and suspension precision

What's Included

• Front Spherical Caster Rod Bushing Set with FK Racing Bearings
• 6061-T6 Aluminum housings
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• Performance-oriented street driving
• Track days and autocross
• Enthusiasts seeking precise suspension control
• BMW owners looking to upgrade factory suspension bushings for improved handling