KYB KG4731 Shock Absorber - Front

KYB Gas-a-Just Front Shock Absorber

The KYB Gas-a-Just KG4731 is a monotube front shock absorber built to restore OE-style control on select Mercedes-Benz models. It uses separate hydraulic and high-pressure gas chambers for responsive damping, steady ride quality, and quicker steering response.

Key Features

• Monotube design with separate gas and oil chambers for fade-resistant operation
• Up to 25% more damping performance than original equipment shocks
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Higher gas pressure supports faster response during braking and steering inputs
• Designed specifically for Mercedes-Benz suspension tuning
• Includes dust cover, B-stop, and R-stop
• Lower mount type: E2(10X40); upper mount type: S1

Product Details

Gas-a-Just is KYB’s monotube shock line for drivers who want firmer control without sacrificing normal-road comfort. The KG4731 is engineered for front suspension use on Mercedes-Benz SLK230, SLK320, CLK430, and CLK320 applications, including sport suspension setups where listed. This part cross-references Monroe Shocks & Struts (e.g., 39042) for the same application.

Compatible With 1998-2004 Mercedes-Benz SLK230, front; 2001-2004 Mercedes-Benz SLK320, front; 1999-2003 Mercedes-Benz CLK430, front; and 1998-2002 Mercedes-Benz CLK320, front. The KYB KG4731 is a direct-fit suspension shock absorber for restoring front-end damping control on these vehicles.

Common Problems This Part Can Address

• Excessive front-end bounce after bumps
• Reduced steering response during lane changes or braking
• Shock fade from heat buildup during repeated driving demands
• Fluid leakage from worn shock seals
• Loose or unsettled ride quality on heavier wheel and tire setups

Installation Notes and Tips

Follow the manufacturer’s instructions for strut and coil spring assembly replacement where specified. Verify mount style, compressed length, extended length, and stroke length before installation. Because this is a front suspension shock for Mercedes-Benz applications, confirm the vehicle’s suspension configuration and match the listed fitment exactly.

Quality Assurance

KYB is an OE-focused suspension brand, and the Gas-a-Just line is built as a monotube replacement to help restore original vehicle handling characteristics. The KG4731 is engineered for consistent damping response and long-term seal protection through its chrome piston rod design.