Kartboy KB-003-DIFF-H Hard Rear Differential Bushing Kit for 2002–2007 Subaru WRX and 2004–2007 WRX STI

Kartboy 02-07 Subaru WRX/04-07 Subaru WRX STi Rear Differential Bushing Kit - Hard

Upgrade the rear differential mounting support of your Subaru with the Kartboy KB-003-DIFF-H Hard Rear Differential Bushing Kit. Designed for 2002–2007 Subaru WRX and 2004–2007 Subaru WRX STI models, this kit helps reduce unwanted differential movement under acceleration, shifting, and high-load driving conditions. The hard bushing compound provides a more secure connection between the rear differential and chassis, supporting improved drivetrain response.

By limiting excess flex in the factory mounting system, the Kartboy KB-003-DIFF-H can help deliver more consistent power transfer and sharper driveline engagement. It is well suited for performance-oriented street vehicles, autocross cars, and track-focused Subaru applications where maintaining drivetrain alignment is important. The robust construction is engineered to withstand the increased loads associated with spirited driving and modified powertrains.

This Kartboy rear differential bushing kit is supplied as a single vehicle-specific kit and is intended for direct installation on compatible Subaru platforms. Verify model year, drivetrain configuration, and bushing application before ordering. Professional installation is recommended, as installation may require supporting or lowering the rear differential and using appropriate service equipment.

Features:

• Vehicle-specific fitment: Designed for 2002–2007 Subaru WRX and 2004–2007 Subaru WRX STI models.
• Hard bushing compound: Helps minimize rear differential movement under acceleration and load.
• Improved drivetrain response: Supports more direct power transfer and consistent differential positioning.
• Performance-oriented construction: Suitable for spirited street driving, autocross, and track applications.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1