SUBARU DBS35-003 – SUMO Rear Subframe Mount Bushing Insert Kit Subaru BRZ / Toyota 86

DBS35-003 – SUMO Rear Subframe Mount Bushing Insert Kit

Positive Traction Kit – Locks Subframe to Body

The SUMO DBS35-003 Rear Subframe Mount Bushing Insert Kit is a performance-focused drivetrain and chassis upgrade designed to reduce rear subframe movement by eliminating excess compliance in the factory subframe bushings.

Rather than replacing the OEM bushings, this insert system works with them to control unwanted movement—commonly referred to in motorsport as “lost motion.” The result is improved rear-end stability, more consistent alignment under load, and a more connected driving feel.

Purpose & Function

From the factory, rear subframe bushings are designed with significant compliance to isolate noise and vibration. Under performance driving conditions, this compliance allows the rear subframe to shift relative to the body, which can cause:

• Inconsistent rear alignment

• Delayed traction response

• Unpredictable handling during cornering

The DBS35-003 insert kit fills the voids in the factory bushings, locking the subframe more securely to the body while retaining the original bushings.

Key Benefits

• Reduces rear subframe movement under load

• Improves rear-end traction and stability

• Enhances cornering response and handling feedback

• Maintains factory bushings for reduced installation effort

This is a positive traction-style insert kit and may slightly increase NVH compared to factory isolation.

Design & Construction

• Precision-molded insert design

• Durable performance-grade material

• Engineered to integrate with OEM subframe bushings

• Designed for long-term street and performance use

Installation Notes

• Insert-style installation — no bushing removal required

• No cutting or permanent modification

• DIY-friendly installation

• Professional installation optional but not required

Vehicle Fitment

Rear Subframe Mount Insert Application

• Subaru BRZ (2013–2020)

• Subaru BRZ – 2nd Gen (2022–present)

• Toyota 86 (2013–2020)

• Toyota GR86 (2022–present)

• Subaru WRX / WRX STI (2008–2021 | GR / GV / VA)

• Subaru Impreza (2008–2016 | GE / GH)

• Subaru Forester (2009–2018 | SH / SJ)

• Subaru Legacy / Outback (2005–2014 | BL / BP / BM / BR)

Use Case

Ideal for:

• Performance street vehicles

• Track day and autocross applications

• Drivers seeking improved rear stability without full bushing replacement

Best suited for enthusiasts prioritizing traction, stability, and predictable handling.