SPL Parts Rear Knuckle Bushings BRZ / FR-S / 86 13-25 / WRX 15-25 / STI 15-21 | SPL RKB FRS

Description

Product Fitment: 

2013-2025 Subaru BRZ

2017-2025 Toyota 86

2013-2016 Scion FR-S

2015-2025 Subaru WRX

2015-20221 Subaru STI

Upgrade your suspension with SPL’s Rear Knuckle Bushings, replacing the factory rubber with maintenance-free, PTFE-lined spherical bearings. This eliminates deflection under hard acceleration and braking, improving throttle response, braking stability, and driver feedback. Housed in precision-machined 6061-T6 aluminum, they offer reduced wheel hop and long-lasting performance.

Key Features:

• Replaces OEM rubber bushing with PTFE-lined FK spherical bearing

• Improves throttle/braking response and steering feedback

• Reduces wheel hop and unwanted suspension movement

• Lightweight: 0.674 lbs total (0.337 lbs per side)

• Precision-machined 6061-T6 aluminum housing

• Moderate NVH increase; ideal for performance setups

Best when combined with performance shocks and compliant tires to manage NVH.

Installation Instructions

SPL GR86/BRZ/GT86/FT86/WRX Knuckle Bushing Install Instructions