KYB 553367 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Mercedes-Benz CLK

The KYB Gas-a-Just 553367 is a monotube rear shock absorber built as an OE-style replacement for select Mercedes-Benz CLK models. It restores original ride control with a design that separates hydraulic fluid and high-pressure nitrogen gas for quick response and consistent damping.

Compatible with 2003-2009 Mercedes-Benz CLK applications, including CLK320, CLK350, CLK550, and CLK55 AMG rear suspension setups, this KYB Gas-a-Just shock is a direct choice for drivers who want firmer control without changing the vehicle’s intended suspension behavior.

Key Features

• Monotube OE replacement design for rear suspension service
• Air-free hydraulic piston and valve area for responsive damping
• High-pressure nitrogen gas chamber for fade-resistant operation
• Triple chrome plated piston rod helps reduce seal wear
• Built for vehicles that tow, work, or use larger, heavier wheels and tires
• Supports steering response and suspension control on Mercedes-Benz CLK models
• Includes dust cover; B-stop and R-stop are listed as present

Product Details

KYB Gas-a-Just shocks are part of the Gas-a-just product line, which focuses on monotube construction for direct response and stable control. The 553367 uses separate working chambers to keep gas and oil isolated, helping maintain consistent performance during normal driving and under higher suspension loads. With a compressed length of 17.32 inches, extended length of 22.44 inches, and 5.12 inches of stroke, it is sized for the listed rear applications and their factory suspension geometry.

This part number 553367 is a practical OE-style replacement for Mercedes-Benz CLK rear suspension service. It cross-references Monroe Shocks & Struts 39047 for the same application.

What It Helps Address

• Excessive rear-end bounce over bumps
• Reduced control during braking and cornering
• Slow steering response from worn rear dampers
• Shock fade during repeated suspension movement
• Ride instability on heavier wheel and tire setups

Installation Notes and Tips

Fits 2003 Mercedes-Benz CLK320, rear; 2004-2006 Mercedes-Benz CLK55 AMG, rear; 2006-2009 Mercedes-Benz CLK350, rear; and 2007-2009 Mercedes-Benz CLK550, rear. Follow the manufacturer’s instructions for replacing the suspension strut and coil spring assembly where specified. Verify upper mount type S1 and lower mount type E2(10X40) before installation, and confirm the vehicle’s rear suspension configuration matches the listed fitment.

Quality Assurance

KYB designs Gas-a-Just shocks as OE monotube replacements to restore factory handling characteristics and maintain the suspension performance expected by the vehicle manufacturer. The monotube layout, high-pressure gas charge, and chrome piston rod construction are engineered to support consistent damping and reduced seal wear in daily use.