KYB 554384 Suspension Shock Absorber - Rear

KYB Gas-a-Just Rear Shock Absorber

The KYB Gas-a-Just 554384 is a monotube rear shock absorber built as an OE-style replacement for vehicles that need restored control and consistent damping. It is designed for Hyundai and Kia rear suspension applications, including Hyundai Elantra, Veloster, and Elantra GT, plus Kia Forte, Forte5, Forte Koup, and Rio.

Key Features

• Monotube OEM replacement design for direct suspension service
• Separate hydraulic and high-pressure nitrogen chambers for quick response and stable control
• High-pressure monotube construction helps maintain fade-resistant operation
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Higher gas pressure improves steering response and suspension control
• Designed for vehicles that work, tow, or use larger, heavier tires and wheels
• Dust cover included

Product Details

Gas-a-Just is KYB’s monotube shock line for drivers who want OE-style replacement performance with firmer response when the vehicle is loaded or driven harder. Part number 554384 uses an air-free hydraulic working area for control and a separate nitrogen gas chamber with a floating piston for consistent damping. That layout helps the shock react quickly while maintaining a comfortable ride during normal driving. This KYB Gas-a-Just 554384 rear shock absorber is a direct-fit suspension service part for Hyundai Elantra rear shock replacement, Kia Forte rear shock replacement, and related compact car applications.

This part cross-references Hyundai 553003X200 and Kia 553001W200 for the same application.

What It Helps Address

• Excessive bouncing after bumps
• Loose or delayed rear suspension response
• Reduced control when carrying load or using heavier wheels and tires
• Fluid leakage from worn shock seals
• Inconsistent ride quality from a fatigued rear shock absorber

Installation Notes

Fits 2014-2018 Kia Forte, rear; 2014-2018 Kia Forte5, rear; 2013-2017 Hyundai Elantra GT, rear; 2012-2017 Hyundai Veloster, rear; 2012-2017 Kia Rio, rear; 2011-2016 Hyundai Elantra, rear; 2014-2016 Kia Forte Koup, rear; and 2013-2014 Hyundai Elantra Coupe, rear. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify rear mounting dimensions before installation: compressed length 10.51 in., extended length 15.23 in., stroke length 4.72 in. Upper mount type is E2(12X47) and lower mount type is E2(12X36).

Quality Assurance

KYB is known for OE suspension engineering, and the Gas-a-Just line is built to restore original handling characteristics with monotube construction and controlled gas pressure. Part number 554384 is engineered for rear suspension service on the listed Hyundai and Kia applications.