KYB 5540019 Shock Absorber - Front

KYB Gas-a-just Front Shock for Ram HD

The KYB Gas-a-just 5540019 is a front suspension shock absorber built for Ram heavy-duty trucks that need firmer control and consistent damping. It uses a monotube design with separate gas and oil chambers to deliver quick response, reduced fade, and improved steering feel during everyday driving and load-carrying use.

Key Features

• Monotube shock absorber design for responsive damping and stable control
• Up to 25% more damping performance than original equipment shocks
• High-pressure nitrogen gas and hydraulic separation for fade-resistant operation
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Engineered for Ram trucks with larger tires, heavier wheels, towing, and work use
• Dust cover included
• Lower mount type: E2 (14.6 x 42); upper mount type: S1 (12 mm)
• Compressed length: 14.72 in; extended length: 21.45 in; stroke length: 6.73 in

Product Details

KYB Gas-a-just shocks are part of the Gas-a-just line, which focuses on monotube performance for trucks that see demanding road conditions and added front-end load. The 5540019 uses a high-pressure design that separates gas from oil, helping maintain consistent damping and quicker steering response as suspension demands change. For Ram 2500 and Ram 3500 front suspension service, this shock is a direct-fit performance upgrade that supports control without sacrificing normal ride quality.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Part number 5540019 is also a useful reference when comparing front shock options for Ram 2500 and Ram 3500 trucks.

What It Helps Address

• Excessive front-end bounce over rough pavement
• Reduced steering response from worn OE shocks
• Shock fade during repeated suspension movement
• Front suspension instability with towing or heavier wheels and tires
• Fluid leakage caused by seal wear on aging shocks

Installation Notes

• Fits 2020-2025 Ram 2500, front, Monotube Performance Upgrade; Gas-a-just
• Fits 2014-2019 Ram 2500, front, Install a monotube shock absorber to enhance performance.; Gas-a-just
• Fits 2013-2018 Ram 3500, front, Monotube Performance Upgrade; w/o Rear Air Springs; Gas-a-just
• Verify mount style and compressed/extended length before installation.
• Inspect related suspension components, bushings, and hardware condition during shock replacement.
• Confirm vehicle configuration matches the listed fitment notes, especially rear air spring equipment on Ram 3500 models.

Quality Assurance

KYB designs Gas-a-just shocks with performance-focused valving and monotube construction for consistent damping on Ram HD applications. The high-pressure gas design and chrome piston rod are used to support long-term control and reduce wear in demanding front suspension service.