KYB 551104 Suspension Strut - Front

KYB Gas-a-Just Front Strut 551104

The KYB Gas-a-Just 551104 is a front suspension strut built for Toyota trucks and SUVs that need firmer control and quicker response than a standard twin-tube design. It is engineered for Toyota Tacoma, 4Runner, and FJ Cruiser front applications, with monotube construction that separates gas and oil for consistent damping.

Key Features

• Monotube design with separate gas and oil chambers for fade-resistant operation and immediate response
• Up to 25% more damping performance than original equipment shocks
• High-pressure nitrogen gas helps improve steering response and control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for Toyota Tacoma applications
• Dust cover included
• Compressed length: 16.89 in; extended length: 21.73 in; stroke length: 4.84 in
• Lower mount type: E2(14X40); upper mount type: S1(12MM)

Product Details

KYB Gas-a-Just shocks and struts are part of the Gas-a-Just line, which focuses on monotube performance for vehicles that work, tow, or run larger tires and wheels. The 551104 uses a high-pressure monotube layout to keep damping consistent under load, while the air-free hydraulic working area supports responsive control during normal driving. This KYB 551104 front strut is a direct-fit suspension upgrade for drivers looking to restore handling precision on a Toyota Tacoma, 4Runner, or FJ Cruiser.

This part cross-references Monroe Shocks & Struts 71371 for the same application.

Common Problems This Part Can Address

• Excessive front-end bounce over bumps
• Reduced steering response during braking or lane changes
• Loss of damping consistency from heat or aeration
• Fluid leakage caused by worn piston rod seals
• Front suspension instability on vehicles carrying heavier tires or wheels

Installation Notes

Fits 2005-2015 Toyota Tacoma, front; install a monotube shock absorber to enhance performance. Fits 2003-2009 Toyota 4Runner, front; monotube performance upgrade, except X-REAS and adjustable suspensions. Fits 2007-2009 Toyota FJ Cruiser, front; install a monotube shock absorber to enhance performance. Verify mount style and dimensions before installation. Part number 551104 should be matched to the vehicle’s front suspension configuration before service begins.

Quality Assurance

KYB designs Gas-a-Just monotube dampers to maintain consistent control and support vehicle systems that rely on suspension performance, including braking and stability functions. The 551104 is built with a triple chrome plated piston rod and high-pressure monotube construction to support long-term sealing performance and responsive damping.