KYB KG5493 Suspension Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Ranger and B-Series

The KYB Gas-a-just KG5493 is a rear suspension shock absorber built for Ford Ranger and Mazda B-Series trucks that need firmer control than a standard twin-tube design. Its monotube construction separates gas and oil for quick response, consistent damping, and reduced fade during demanding driving.

Gas-a-just is KYB’s performance shock line for trucks that work, tow, or run larger wheels and tires. For rear suspension service on a Ford Ranger or Mazda B4000, KG5493 adds damping authority while maintaining a controlled ride in everyday use.

Key Features

• Adds up to 25% more damping performance over original equipment shocks
• Monotube design separates gas and oil for fade-free operation and instant response
• High-pressure nitrogen gas chamber improves steering response and load control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Dust cover included for added protection
• Engineered for Ford truck applications with Gas-a-just valving
• Part number KG5493 for easy identification

Detailed Product Overview

KYB KG5493 uses two working chambers: an air-free hydraulic section for control and a high-pressure nitrogen section with a floating piston for consistent performance. That design helps the shock react quickly when the truck is loaded, towing, or driven on rough pavement. It is a direct-fit rear shock absorber for a wide range of Ford Ranger and Mazda B3000/B4000 applications, including many monotube performance upgrade and OE replacement uses. This part cross-references Monroe Shocks & Struts (e.g., 911039) for the same application.

Common Problems This Shock Can Address

• Excessive rear bounce after bumps or dips
• Reduced control when carrying cargo or towing
• Soft or delayed rear suspension response
• Shock fade during repeated suspension movement
• Wear-related fluid leakage from aging rear shocks

Installation Notes and Fitment

• Fits 2001-2011 Ford Ranger, rear, with notes for monotube performance upgrade applications; excludes High Ryder option and includes torsion bar front suspension notes where listed
• Fits 1990-1997 Ford Ranger, rear, monotube performance upgrade applications; excludes High Ryder option
• Fits 1989 Ford Ranger, rear, from 2/1989; excludes High Ryder option
• Fits 1994-2009 Mazda B4000, rear, monotube performance upgrade applications
• Fits 2001-2007 Mazda B3000, rear, with torsion bar front suspension notes where listed
• Fits 2001-2006 Mazda B4000, rear, with torsion bar front suspension notes where listed
• Fits 1994-2002 Mazda B3000, rear, install a monotube shock absorber to enhance performance
• Fits 1997-1998 Ford F-250, rear, over 8500 GVW
• Fits 1997 Ford F-250 HD, rear, over 8500 GVW
• Fits 1985-1997 Ford F-350, rear, with monobeam front suspension and single rear wheels
• Fits 1990-1996 Ford F-150, rear, install a monotube shock absorber to enhance performance
• Fits 1992-1996 Ford F-250, rear, install a monotube shock absorber to enhance performance

Before installation, verify compressed length, extended length, and mount types against the existing shock and vehicle configuration. KG5493 uses an E2(12X38) lower mount and E1 upper mount, with a 16.26 in compressed length, 26.18 in extended length, and 9.92 in stroke.

Quality Assurance

KYB designs Gas-a-just shocks for consistent damping, reduced fade, and improved control in truck applications. The KG5493 is built with a monotube layout and a chrome piston rod to support long-term sealing performance in demanding rear suspension service.