KYB 555049 Shock Absorber - Front

KYB Gas-a-Just Shock Absorber for Hummer H3

The KYB Gas-a-Just 555049 is a monotube suspension shock absorber built as an OE-style replacement for the front of the 2006-2010 Hummer H3. It is engineered to restore original ride control, steering response, and suspension behavior on vehicles that work, tow, or run larger tires and wheels.

Key Features

• Monotube OEM replacement for the correct front suspension application
• Separate gas and oil chambers for consistent damping and quick response
• High-pressure nitrogen design supports fade-resistant operation
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Built to help restore the designed handling of the Hummer H3
• Supports electronic safety systems by maintaining suspension performance as engineered
• Dust cover included
• B-stop and R-stop included in the design

Product Details

KYB Gas-a-Just shocks use a monotube layout with an air-free hydraulic piston area for control and a separate high-pressure nitrogen chamber with a floating piston. That design delivers immediate damping response while maintaining a comfortable ride during normal driving. For the Hummer H3, part number 555049 is a direct-fit front shock absorber that matches the vehicle’s OE-style monotube setup and helps bring back steering precision and suspension control.

This part cross-references Monroe Shocks & Struts (e.g., 911527) for the same application. It is a strong fit for drivers searching for a front shock absorber for 2006-2010 Hummer H3, KYB Gas-a-Just 555049, or an OE replacement shock for a Hummer H3 front suspension.

Common Problems This Part Can Address

• Excessive bounce or poor body control over bumps
• Reduced steering response and loose front-end feel
• Shock fade during heavier use, towing, or rough-road driving
• Oil leakage from worn shock seals
• Uneven ride quality after suspension wear

Installation Notes and Tips

Fits 2006-2010 Hummer H3, front. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify mount style and dimensions before installation: compressed length 11.88 in., extended length 15.27 in., stroke length 3.39 in. The upper mount type is S1 and the lower mount type is SPECIAL.

Quality Assurance

KYB is known for OE-level suspension engineering, and the Gas-a-Just line is designed as a monotube replacement that follows original vehicle performance requirements. Part number 555049 is built to support consistent damping, steering response, and suspension control on the Hummer H3 platform.