Overtake Rear Differential Upper Bushing Inserts 2008-2026 WRX / 2008-2021 STI | Urethane Inserts | Drivetrain Upgrade
Overview
The Overtake Rear Differential Upper Bushing Inserts are designed to enhance the performance and responsiveness of your Subaru WRX or WRX STI’s all-wheel-drive system. By replacing the factory rubber mounts with precision-engineered urethane inserts, these bushings reduce unwanted differential movement under load, translating more power directly to the wheels. This upgrade is ideal for enthusiasts seeking sharper throttle response and improved drivetrain feedback without a full differential mount replacement.
Crafted with a focus on durability and performance, Overtake’s urethane formulation resists heat, oil, and environmental wear far better than stock rubber. The inserts slip over the OEM rear differential bushings and are secured with included spacers, creating a unified mounting point that virtually eliminates deflection. This design philosophy balances enhanced rigidity with long-term reliability, making it a practical upgrade for street and track Subaru owners alike.
Real-world benefits include improved power transfer during aggressive acceleration and cornering, resulting in a more connected driving experience. While there is a slight increase in noise, vibration, and harshness (NVH), many Subaru enthusiasts appreciate the added drivetrain feedback as it enhances vehicle control and engagement. This upgrade is a straightforward way to tighten up your Subaru’s rear differential without compromising daily drivability.
Features & Specifications
This Overtake Rear Differential Upper Bushing Insert set is engineered specifically for 2008-2026 Subaru WRX and 2008-2021 WRX STI models. Constructed from high-quality urethane, it delivers increased drivetrain rigidity and durability for Subaru enthusiasts seeking improved power transfer and handling precision.
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Brand: Overtake
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Product: Rear Differential Upper Bushing Inserts
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Part Number: A10851
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Fitment: 2008-2010 STI, 2008-2010 WRX, 2011-2014 STI, 2011-2014 WRX, 2015-2021 STI, 2015-2021 WRX, 2022-2026 WRX
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Material: Urethane
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Finish: Natural urethane color
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Construction: Molded urethane inserts with steel spacers
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Origin: Not specified
Key Benefits
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Performance: Reduces differential movement to improve power transfer and throttle response.
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Durability: Urethane resists heat, oil, and environmental degradation for long-lasting performance.
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Fitment: Directly fits over OEM rear differential bushings for a simple, bolt-on upgrade.
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Drivetrain Feedback: Enhances NVH slightly to provide better connection and feel through the drivetrain.
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Value: Cost-effective way to tighten rear differential without full mount replacement.
What's Included
- 2× Overtake Rear Differential Upper Bushing Inserts
- 2× Bushing Washers (spacers)
- 1× Super Lube Packet
Installation & Compatibility
Installation of the Overtake Rear Differential Upper Bushing Inserts is moderately straightforward for enthusiasts with basic mechanical skills and common hand tools. The inserts slip over the existing OEM rubber bushings, and the included washers sandwich the assembly to eliminate deflection. While no special tools are required, careful attention to torque specifications and proper lubrication with the provided Super Lube is recommended. Expect a slight increase in drivetrain noise and vibration, which is normal for urethane upgrades.
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Professional Installation: Recommended for those unfamiliar with differential components
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Modifications Required: None; direct fit over OEM bushings
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Verify Compatibility: Confirm fitment for your specific Subaru WRX or WRX STI year and model
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