Description:

The KYB Gas-a-Just monotube shock absorber has additional performance advantages over the traditional twin-tube design: It can instantly, automatically adjust to your performance needs and never experiences fade due to aeration. The Gas-a-Just is available as an OE monotube replacement and as an OE twin-tube performance upgrade. The KYB Gas-a-Just has two separate working chambers: An air-free hydraulic piston and valve area for responsiveness & control, and a second high-pressure nitrogen gas area with a floating piston that provides a comfortable ride during normal driving and adds instant performance on demand. Model # 551121 Features: The correct, monotube-designed OEM replacement shock Specifically calibrated to help restore the original handling and control characteristics of Full-Size GM trucks High gas pressure design provides instant, extra control monotube design outperforms all other standard shock absorbers Unique, air-free, hydraulic unit eliminates performance fade.