KYB 5510021 Gas-A-Just Front Right Strut for 2015-2017 Subaru WRX STI 2.5L H4

Vehicle Fitment

• 2015-2017 Subaru WRX STI (VA Platform, AWD, 2.5L H4 Turbocharged EJ257 Engine)

Fitment Notes

• Front right passenger-side strut application only.
• Designed for factory ride-height suspension configurations.
• Fits WRX STI models; verify compatibility before installation on non-STI WRX models.
• Does not include coil spring, upper mount, or spring isolators.

Features

• KYB Gas-A-Just high-pressure monotube strut engineered for performance-oriented OE replacement.
• Designed to restore Subaru WRX STI factory handling control and suspension response.
• Monotube construction separates gas and oil for consistent damping performance.
• High-pressure nitrogen gas charge helps reduce foaming and suspension fade.
• Self-adjusting valving responds quickly to changing road conditions.
• Hard chrome-plated piston rod helps reduce friction and improve durability.
• Triple chrome-plated rod surface helps protect sealing components.
• Direct-fit replacement design maintains factory suspension geometry and ride height.

Specifications

• Brand: KYB
• Series: Gas-A-Just
• Part Number: 5510021
• Product Type: Bare Strut Assembly
• Position: Front Right (Passenger Side)
• Vehicle Drive Type: AWD
• Engine Application: 2.5L H4 Turbocharged EJ257
• Construction: High-pressure monotube gas design
• Adjustable: No
• Compressed Length: 15.15 inches
• Extended Length: 18.66 inches
• Stroke Length: 3.51 inches
• Upper Mount Type: Stem
• Lower Mount Type: Bracket
• Mounting Hardware Included: Yes

Included Components

• 1x KYB 5510021 Gas-A-Just Front Right Strut

Product Description

The KYB 5510021 Gas-A-Just Front Right Strut is designed for 2015-2017 Subaru WRX STI models equipped with the VA chassis and 2.5L turbocharged EJ257 engine. This high-performance replacement strut helps restore precise suspension control, steering response, and chassis stability while maintaining the vehicle's original suspension configuration.

Featuring KYB's high-pressure monotube design, the Gas-A-Just series provides quick response and consistent damping by separating gas and oil inside the strut body. The advanced construction helps reduce fade during demanding driving conditions while improving handling control and road feedback.

This passenger-side front strut is ideal for Subaru WRX STI owners seeking a reliable OE-style replacement with enhanced monotube performance. It installs in the factory location and is designed to work with original suspension components while preserving factory ride height.