KYB SR4456 Suspension Strut and Coil Spring Assembly - Front

KYB Strut-Plus SR4456 Front Strut Assembly

The KYB Strut-Plus SR4456 is a complete front suspension strut and coil spring assembly engineered for OE-style ride height, handling, and control. It is built for select Ford Expedition, Ford F-150, and Lincoln Navigator applications with electronic and load-leveling suspension exclusions noted below.

Key Features

• Complete front strut assembly for direct replacement service
• Includes a KYB Excel-G strut with application-specific damping valves
• Uses a stronger steel outer shell for added structural support
• High-carbon steel coil spring is matched to vehicle corner weights and ride height targets
• Pre-assembled for exact fitment and professional installation results
• Engineered to work with vehicles equipped with electronic safety systems such as ESC and ABS

Product Line Details

KYB Strut-Plus is the brand’s complete strut assembly line for restoring suspension performance without rebuilding the unit from individual components. The SR4456 combines KYB’s OE-restoring strut design with a vehicle-specific spring package to help return the front suspension to factory ride height and handling characteristics.

Detailed Description

As a suspension strut and coil spring assembly, the KYB SR4456 supports vehicle weight, helps establish ride height, serves as a steering pivot, and contributes to stability during braking and cornering. For 2014-2017 Ford Expedition front applications, 2015-2017 Lincoln Navigator front applications, and 2014 Ford F-150 front applications, this assembly is built as a recommended OE replacement with fitment exclusions for electronic, load-leveling, self-leveling, and heavy-duty payload configurations as listed. This part cross-references Monroe Shocks & Struts (e.g., 172900, 182900) for the same application. The KYB SR4456 is a practical choice when replacing a worn front strut assembly on a Ford Expedition, Ford F-150, or Lincoln Navigator and restoring predictable steering response and suspension control.

What It Helps Address

• Front-end sag or reduced ride height
• Excessive bounce, nose dive, or unstable handling
• Worn strut performance that affects steering feel
• Suspension noise or harsh ride from aging components
• Ride quality changes caused by a fatigued coil spring and strut assembly

Installation Notes and Tips

Verify exact vehicle configuration before ordering. Fits 2014-2017 Ford Expedition, front, excluding electronic and load leveling suspension. Fits 2015-2017 Lincoln Navigator, front, excluding electronic and load leveling suspension. Fits 2014 Ford F-150, front, excluding heavy duty payload package. Fits 2014 Lincoln Navigator, front, excluding self leveling suspension. Confirm alignment after installation and inspect related suspension components for wear before completing the repair.

Quality Assurance

KYB is an original equipment supplier, and the Strut-Plus line is engineered to restore handling, control, and ride height using OE-focused design and application-specific damping. The SR4456 is built to support vehicles with electronic safety systems such as ESC and ABS where equipped.