KYB KG54342 Suspension Shock Absorber - Rear

KYB Gas-a-just Rear Shock KG54342

KYB Gas-a-just KG54342 is a monotube rear shock absorber built for trucks that need firmer control, quicker response, and OE-style replacement fitment. It is engineered for GM and Ram applications where added damping is needed for towing, hauling, factory lift setups, or larger wheels and tires.

Key Features

• Monotube design separates gas and oil for consistent, fade-resistant operation
• High-pressure nitrogen gas and floating piston deliver immediate response
• Up to 25% more damping performance than original equipment shocks
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for GM truck applications, with broader rear fitment across Chevrolet Silverado, GMC Sierra, and Ram 1500 models
• Dust cover included; lower and upper mount type: E2 (14.6 x 42)

Product Details

The KYB Gas-a-just line is a monotube performance shock series focused on restoring control while adding extra damping where factory shocks can fall short. KG54342 uses an air-free hydraulic working chamber for responsiveness and a separate high-pressure gas chamber for stable ride quality and instant performance on demand. This makes it a strong choice for Chevrolet Silverado 1500, GMC Sierra 1500, and Ram 1500 rear suspension service, especially on trucks used for work or fitted with heavier tires and wheels. This part cross-references Monroe Shocks & Struts (e.g., 911502) for the same application.

What It Helps Address

• Excessive rear-end bounce over bumps and expansion joints
• Reduced control when towing or carrying heavier loads
• Soft or worn OE shock performance on lifted trucks
• Delayed steering response and unsettled handling from tired rear dampers
• Fluid leakage or seal wear associated with aging shock absorbers

Installation Notes and Fitment

Compatible With rear applications on 2019-2025 Chevrolet Silverado 1500 w/ Factory Lift; 2019-2024 GMC Sierra 1500 w/ Factory Lift; 2022-2024 Ram 1500 Classic (Exc. Air Suspension); 2019-2021 Ram 1500 Classic (Exc. Air Suspension); 2013-2018 Ram 1500 (Exc. Air Suspension); 2011-2012 Ram 1500; and additional rear GM truck applications listed for Silverado and Sierra HD models. Verify compressed length 15.94 in., extended length 25.78 in., and stroke length 9.84 in. before installation. Follow manufacturer procedures for rear shock replacement and confirm mount style and suspension configuration match the vehicle.

Quality Assurance

KYB designs Gas-a-just shocks as OE monotube replacement components to restore original vehicle capability with added damping performance. KG54342 is built with a high-pressure monotube layout and corrosion-resistant piston rod construction for dependable service in demanding truck use.