KYB KG5485 Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Mazda B2600

The KYB Gas-a-just KG5485 is a monotube suspension shock absorber built to restore OE-style control for the rear of 1987-1993 Mazda B2600 trucks. It is designed for drivers who need firmer response, stable handling, and consistent damping in everyday use.

Gas-a-just is KYB’s monotube product line for vehicles that work harder than a standard commuter. For the Mazda B2600 rear application, the KG5485 adds damping capacity for trucks with heavier tires and wheels while maintaining a controlled ride during normal driving.

Key Features

• Adds up to 25% more damping performance than original equipment shocks
• Monotube design separates gas and oil for fade-resistant operation and quick response
• High-pressure nitrogen gas helps improve steering response and control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Valving and components are engineered for Nissan truck applications
• Dust cover included
• Compatible rear shock replacement for 1987-1993 Mazda B2600

Detailed Description

KYB KG5485 uses a high-pressure monotube layout with two working chambers: an air-free hydraulic section for responsiveness and a nitrogen gas section with a floating piston for consistent damping. That design helps the shock react quickly when load, road input, or braking demand changes. For Mazda B2600 rear suspension service, this part number supports a more controlled feel than a worn OE shock while preserving normal ride comfort.

This part cross-references Monroe Shocks & Struts 37017 for the same application. The KYB Gas-a-just KG5485 is a direct-fit rear shock absorber for 1987-1993 Mazda B2600, rear, and is also listed as a replacement option for drivers seeking firmer OE-style suspension performance.

What It Helps Address

• Excessive rear bounce after bumps
• Reduced control from worn shock absorbers
• Slow steering response caused by weak damping
• Fade in performance during repeated suspension movement
• Ride instability on trucks with heavier tires and wheels

Installation Notes and Tips

Fits 1987-1993 Mazda B2600, rear. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions where applicable. Verify compressed length, extended length, and mount style before installation: compressed length 14.96 in., extended length 24.21 in., stroke length 9.25 in., upper mount E2(20X43), lower mount E2(12X41).

For best results, inspect related rear suspension components for wear before installing KYB KG5485. Confirm the vehicle’s rear shock application and mounting points match the listed fitment for the Mazda B2600.

Quality Assurance

KYB designs Gas-a-just shocks as OE monotube replacement parts to restore original vehicle capability. The monotube construction, high-pressure gas charge, and corrosion-resistant piston rod are used to support consistent damping and long-term seal protection.