KYB KG4160 Shock Absorber - Front

KYB Gas-a-Just Front Shock Absorber

The KYB Gas-a-Just KG4160 is a monotube suspension shock absorber built as an OE-style replacement for vehicles that need restored control and consistent response. It is engineered for the front suspension of the Chrysler Aspen and Dodge Durango, including applications that see towing, heavier wheels, or regular load demands.

Key Features

• Monotube OEM replacement design for direct suspension service
• Separate hydraulic and high-pressure nitrogen chambers for responsive damping
• High-pressure gas construction helps maintain fade-resistant operation
• Triple chrome plated piston rod helps reduce seal wear from fluid leakage
• Improves steering response through higher gas pressure
• Supports electronic safety systems by helping the suspension operate as designed
• Dust cover included

Product Details

Gas-a-Just is KYB’s monotube shock line, designed to restore original handling characteristics with a firmer, more controlled feel than a worn OE unit. The KG4160 uses an air-free hydraulic working area for damping response and a separate nitrogen gas chamber with a floating piston to keep oil and gas isolated. That layout supports consistent performance during normal driving and quicker reaction when the suspension is working harder. This part number, KG4160, is a fitment-specific front shock for 2007-2009 Chrysler Aspen and 2004-2009 Dodge Durango applications.

This part cross-references Monroe Shocks & Struts 911259 for the same application.

What It Helps Address

• Excessive front-end bounce after hitting bumps
• Reduced steering response and loose handling feel
• Shock fade during towing or heavier-duty use
• Uneven control with larger tires and wheels
• Fluid leakage related to worn piston rod seals

Installation Notes and Tips

Fits 2007-2009 Chrysler Aspen, front. Fits 2004-2009 Dodge Durango, front. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify compressed length, extended length, and mount style before installation. KG4160 is a front suspension shock absorber, and the vehicle should be inspected for related wear in mounts, springs, and surrounding suspension components during service.

Quality Assurance

KYB designs the Gas-a-Just line as an OE monotube replacement to help restore the vehicle’s original suspension behavior. The KG4160 uses a high-pressure monotube layout with a chrome piston rod and dust cover for durable service in front suspension applications.