KYB 5540004 Suspension Shock Absorber - Rear

Overview of KYB Gas-a-just Suspension Shock Absorber

The KYB Gas-a-just 5540004 suspension shock absorber is engineered for Lexus IS200t, IS250, IS300, and IS350 models. Designed to restore your vehicle's original handling and ride comfort, this shock absorber features precise dimensions and advanced internal components for consistent performance.

• Compressed length: 18.5 inches
• Extended length: 24.05 inches
• Stroke length: 5.55 inches
• Lower mount type: E2 (14.2x70)
• Upper mount type: S1 (12mm)
• Internal rebound spring included
• R-stop feature included, B-stop not included
• No dust cover included

Detailed Product Features and Specifications

This KYB Gas-a-just shock absorber (part number 5540004) is designed with a compressed length of 18.5 inches and an extended length of 24.05 inches, providing a stroke length of 5.55 inches. The lower mount uses an E2 style with dimensions 14.2x70, while the upper mount is an S1 type with a 12mm diameter. The internal rebound spring enhances damping control, improving ride stability and comfort. The shock absorber includes an R-stop feature to prevent over-extension but does not have a B-stop or dust cover.

About the KYB Gas-a-just Product Line

The Gas-a-just line from KYB is designed to offer a direct replacement shock absorber that matches or exceeds original equipment specifications. This product line focuses on restoring factory ride quality and handling characteristics, making it suitable for Lexus IS200t, IS250, IS300, and IS350 vehicles requiring reliable suspension performance.

Common Applications and Problem Solving

• Restores original ride comfort and handling on Lexus IS models
• Reduces excessive bouncing and body roll
• Improves vehicle stability during acceleration and braking
• Addresses worn or leaking shock absorber symptoms
• Enhances control on uneven or rough road surfaces

Installation Notes and Tips

Ensure compatibility with Lexus IS200t, IS250, IS300, and IS350 models before installation. Verify the lower mount type E2 (14.2x70) and upper mount type S1 (12mm) match your vehicle’s specifications. Since this shock absorber does not include a dust cover, inspect the mounting area for debris or damage prior to installation. Proper torque specifications should be followed to maintain suspension integrity.

Quality Assurance and Warranty

KYB Gas-a-just shock absorbers are manufactured to meet strict quality standards for durability and performance. This part number 5540004 is backed by KYB’s quality assurance processes. Please refer to KYB’s official warranty policy for detailed coverage information.