Kartboy Rear Differential Bushings Set - Hard — Fits Subaru Models

SKU: KBYKB-003-DIFF-H
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Kartboy

Kartboy engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kartboy lineup with fast shipping and expert fitment support — order with confidence.

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Maximize Power Transfer with Kartboy Hard Differential Bushings

Upgrade your Subaru's rear differential with the Kartboy Hard Rear Differential Bushings Set. These high-performance bushings are engineered to drastically reduce differential movement under load, a common issue with softer factory rubber components. By minimizing this unwanted play, you'll experience more direct power transfer to the wheels, leading to improved throttle response and a more connected driving feel, especially during aggressive acceleration and cornering.

Performance Advantages:

  • Reduced Drivetrain Slop: Stiffer material virtually eliminates differential deflection.
  • Enhanced Power Delivery: More efficient transfer of power from the differential to the axles.
  • Improved Launch & Traction: Contributes to better grip off the line and during hard cornering.
  • Durable Construction: Made from a robust, high-durometer material for long-lasting performance in demanding conditions.

This 'Hard' version is ideal for track-focused vehicles and enthusiasts seeking the ultimate in drivetrain rigidity. Experience a noticeable difference in your Subaru's handling and acceleration with this critical upgrade, available at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Kartboy

Kartboy engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kartboy lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Maximize Power Transfer with Kartboy Hard Differential Bushings

Upgrade your Subaru's rear differential with the Kartboy Hard Rear Differential Bushings Set. These high-performance bushings are engineered to drastically reduce differential movement under load, a common issue with softer factory rubber components. By minimizing this unwanted play, you'll experience more direct power transfer to the wheels, leading to improved throttle response and a more connected driving feel, especially during aggressive acceleration and cornering.

Performance Advantages:

  • Reduced Drivetrain Slop: Stiffer material virtually eliminates differential deflection.
  • Enhanced Power Delivery: More efficient transfer of power from the differential to the axles.
  • Improved Launch & Traction: Contributes to better grip off the line and during hard cornering.
  • Durable Construction: Made from a robust, high-durometer material for long-lasting performance in demanding conditions.

This 'Hard' version is ideal for track-focused vehicles and enthusiasts seeking the ultimate in drivetrain rigidity. Experience a noticeable difference in your Subaru's handling and acceleration with this critical upgrade, available at GGCRACING.

Product Details

Product Description

About Kartboy

Kartboy engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kartboy lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Maximize Power Transfer with Kartboy Hard Differential Bushings

Upgrade your Subaru's rear differential with the Kartboy Hard Rear Differential Bushings Set. These high-performance bushings are engineered to drastically reduce differential movement under load, a common issue with softer factory rubber components. By minimizing this unwanted play, you'll experience more direct power transfer to the wheels, leading to improved throttle response and a more connected driving feel, especially during aggressive acceleration and cornering.

Performance Advantages:

  • Reduced Drivetrain Slop: Stiffer material virtually eliminates differential deflection.
  • Enhanced Power Delivery: More efficient transfer of power from the differential to the axles.
  • Improved Launch & Traction: Contributes to better grip off the line and during hard cornering.
  • Durable Construction: Made from a robust, high-durometer material for long-lasting performance in demanding conditions.

This 'Hard' version is ideal for track-focused vehicles and enthusiasts seeking the ultimate in drivetrain rigidity. Experience a noticeable difference in your Subaru's handling and acceleration with this critical upgrade, available at GGCRACING.

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