Whiteline Rear Diff Mount Inserts Positive Power Kit - 2008-2026 Subaru WRX & STI

Unlock Instant Power Transfer: The "Positive Power" Advantage
Subaru engineered the factory rear differential bushings to be soft for maximum comfort, but for the performance enthusiast, this leads to significant torque loss. The Whiteline KDT903 Rear Differential Positive Power Kit is the solution. These high-durometer inserts work within the voids of your original factory bushings to eliminate unwanted movement, ensuring that more power is transferred directly to the wheels instead of being absorbed by shifting drivetrain components.

Crisper Shifts and Improved Stability
By stabilizing the rear differential cradle, the KDT903 provides a more mechanical and connected feel during gear changes. You'll notice an immediate reduction in the "drivetrain wrap" that occurs during hard acceleration and rev-matching. Because these are inserts and not full replacement bushings, they offer a massive performance gain with only a minimal increase in NVH (Noise, Vibration, and Harshness), making them perfect for high-performance street cars.

• Maintains Pinion Angles: Ensures your drivetrain stays aligned under high-torque loads.
• Reduces Initial Torque Loss: Delivers more power to the pavement during launches and gear shifts.
• Synthetic Elastomer Technology: Engineered to resist oil, grease, and road salt while outlasting factory rubber.
• No-Press Installation: Easily slips into the factory bushing voids for a straightforward DIY upgrade.
• Stealth Finish: Produced in Whiteline's modern translucent black/smoke grey finish for a clean, professional look.

Fitment Applications:

• Subaru WRX: 2012–2026+ (Base, Premium, Limited, GT, 6MT, and CVT)
• Subaru WRX STI: 2008–2021 (All trims including Type RA, Launch Edition, & Series.HyperBlue)
• Subaru Impreza WRX: 2008–2014 (Hatch and Sedan)
• Subaru Forester: 2009–2018 (SH & SJ Chassis - XT, 2.5i, etc.)
• Subaru Legacy: 2005–2009 (GT, Spec.B) & 2015–2019 (3.6R, 2.5i)
• Subaru Crosstrek / XV: 2013–2019

Technical Specifications:

• Part Number: KDT903
• Product Type: Rear Differential - Mount in Cradle Inserts
• Material: Translucent Black Synthetic Elastomer
• Installation Time: ~1.5 Hours