Kartboy KB-003-Diff-H Rear Differential Bushing Kit Hard Durometer Subaru

The Kartboy KB-003-Diff-H Rear Differential Bushing Kit is engineered to replace worn or soft factory differential bushings on 2002-2007 Subaru WRX and 2004-2007 STI models. This hard durometer bushing kit significantly reduces differential movement under acceleration and deceleration, improving power transfer and eliminating the sloppy feeling associated with worn OEM bushings.

Key Features:

• Hard durometer polyurethane construction for maximum drivetrain rigidity
• Eliminates excessive differential movement and clunking
• Improves throttle response and power delivery
• Reduces wheel hop during aggressive launches
• Direct replacement for factory bushings
• Includes all necessary hardware for installation

Ideal for performance driving, track use, and aggressive street applications where maximum response is desired. Note that harder bushings may transmit more noise and vibration compared to stock bushings, which is normal for performance-oriented bushing upgrades.