Precision-Lock Rear Differential Bushing Inserts

• 2013–2023 Subaru | Crosstrek
• 2008–2026 Subaru | WRX
• 2008–2021 Subaru | WRX STI
• 2012-2016 Subaru | Impreza
• 2014-2018 Subaru | Forester

The SMY Performance Precision-Lock Rear Differential Bushing Inserts lock down the rear differential of your Subaru to reduce drivetrain movement. Under hard acceleration, launches and cornering, the factory rear differential can twist and deflect within its soft rubber mounts, creating drivetrain slop, delayed throttle response and a rear-end clunk during fast shifts. These inserts bridge the empty gaps in the OEM mounts without pressing out the old factory rubber.

• Part number: SMY-DIF-INKIT
• Fitment: 2008-2014 Subaru WRX, 2008-2014 Subaru WRX STI, 2015-2021 Subaru WRX, 2015-2021 Subaru WRX STI, 2022-2026 Subaru WRX, 2009-2018 Subaru Forester, 2012-2016 Subaru Impreza and 2013-2023 Subaru Crosstrek
• Zero-deflection void-fill design: Precision 3D-scanned tolerances slide directly into the void spaces of the OEM rubber bushings, reinforcing the mount from the inside out
• Material: High-grade, oil- and heat-resistant 85A durometer polyurethane
• Sharper drivetrain dynamics: Keeping the differential firmly aligned under load gives crisper throttle response, more direct power delivery to the rear wheels, smoother gear transitions and enhanced stability when putting power down out of an apex
• 100% reversible drop-in install: The inserts slip over and around the existing OEM bushings using basic hand tools, with no cutting, drilling or permanent modifications required
• Includes: 2 x Front Rear Differential Inserts, 2 x Rear Rear Differential Inserts, 2 x Bushing Washers and 1 x Super Lube Packet

Frequently Asked Questions

Does this fit my Subaru?
This kit is listed for 2008-2014 Subaru WRX and WRX STI, 2015-2021 Subaru WRX and WRX STI, 2022-2026 Subaru WRX, 2009-2018 Subaru Forester, 2012-2016 Subaru Impreza and 2013-2023 Subaru Crosstrek.

What is included in the box?
The box includes 2 front rear differential inserts, 2 rear rear differential inserts, 2 bushing washers and 1 Super Lube packet.

Does installation require pressing out the factory bushings?
No. The inserts slip over and around the existing OEM bushings using basic hand tools, with no cutting, drilling or permanent modifications required.

What material are the inserts made from?
They are molded from high-grade, oil- and heat-resistant 85A durometer polyurethane.

Review our Shipping Policy for delivery details, shipping costs and exclusions.

Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.

Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov