SuperPro Front Lower Inner Control Arm Bushing Kit – 2013–2016 Scion FR-S, 2013–2026 Subaru BRZ & Toyota 86 / GR86 – SPF3877K

SuperPro Front Lower Control Arm Inner Bushing Kit
Restore more precise front suspension control with the SuperPro SPF3877K front lower inner control arm bushing kit. Designed for the Scion FR-S, Subaru BRZ, Toyota 86, and Toyota GR86 platform, this kit replaces both the forward and rearward inner bushings in the front lower control arms.

SuperPro Suspension +1
The original rubber bushings can flex under braking, acceleration, and cornering loads, allowing the lower control arms to move and causing temporary changes in suspension geometry. SuperPro’s polyurethane bushings help keep the control arms more securely located for improved steering response, consistent wheel alignment, and more predictable handling.
SPF3877K is the standard-alignment version and does not add caster correction. It is a practical choice for replacing worn factory bushings or upgrading the front suspension while retaining the original alignment geometry. SuperPro also offers SPF3878K separately for applications requiring additional caster.

The original rubber bushings can flex under braking, acceleration, and cornering loads, allowing the lower control arms to move and causing temporary changes in suspension geometry. SuperPro’s polyurethane bushings help keep the control arms more securely located for improved steering response, consistent wheel alignment, and more predictable handling.

SPF3877K is the standard-alignment version and does not add caster correction. It is a practical choice for replacing worn factory bushings or upgrading the front suspension while retaining the original alignment geometry. SuperPro also offers SPF3878K separately for applications requiring additional caster.

Product Features

Replaces the front and rear inner bushings in both front lower control arms

Standard-alignment design

Does not add caster correction

Helps reduce unwanted control-arm movement

Supports more consistent front suspension geometry

Improves steering response and handling precision

Suitable for street, performance, autocross, and track applications

Proprietary engineering-grade polyurethane construction

Resistant to deterioration from oils, water, and changing temperatures

Direct replacement for the original inner control-arm bushings

SuperPro part number SPF3877K

Vehicle Fitment

2013–2016 Scion FR-S

2013–2020 Subaru BRZ

2022–2026 Subaru BRZ

2017–2020 Toyota 86

2022–2026 Toyota GR86

Current SuperPro application data confirms SPF3877K for both first- and second-generation BRZ applications, including current 2025 models. Current catalog listings also extend the application through the 2026 model year. 

Bushing Locations

This kit services the following positions:

Front lower control arm inner-front bushings

Front lower control arm inner-rear bushings

Driver and passenger sides

Product Specifications

Manufacturer: SuperPro

Part Number: SPF3877K

Product Type: Front lower control arm bushing kit

Installation Position: Front

Control Arm Position: Lower inner, front and rear

Alignment Type: Standard / concentric

Caster Correction: No

Primary Material: Polyurethane

Quantity Required: One kit per vehicle

UPC: 9317745038771

GTIN: 09317745038771

The UPC, polyurethane construction, and one-kit-per-vehicle configuration are supported by current application catalogs. �

SuperPro Europe +1

Installation Note

The original control-arm bushings must be removed before installing the SuperPro components. A hydraulic press and appropriate bushing tools may be required.

Professional installation is recommended. Tighten the suspension fasteners according to the vehicle manufacturer’s specifications and perform a wheel alignment after installation.