KYB 5640021 MonoMax Front Shock for 2021-2025 Ford F-150 4WD

Vehicle Fitment

• 2021-2025 Ford F-150 XL (4WD, gasoline/hybrid powertrains where equipped, without Electronic Suspension, without Off-Road Suspension, without Heavy Payload Package)
• 2021-2025 Ford F-150 XLT (4WD, gasoline/hybrid powertrains where equipped, without Electronic Suspension, without Off-Road Suspension, without Heavy Payload Package)
• 2021-2025 Ford F-150 Lariat (4WD, gasoline/hybrid powertrains where equipped, without Electronic Suspension, without Off-Road Suspension, without Heavy Payload Package)
• 2021-2025 Ford F-150 King Ranch (4WD, gasoline/hybrid powertrains where equipped, without Electronic Suspension, without Off-Road Suspension, without Heavy Payload Package)
• 2021-2025 Ford F-150 Platinum (4WD, gasoline/hybrid powertrains where equipped, without Electronic Suspension, without Off-Road Suspension, without Heavy Payload Package)
• 2021-2025 Ford F-150 Limited (4WD, gasoline/hybrid powertrains where equipped, without Electronic Suspension, without Off-Road Suspension, without Heavy Payload Package)
• 2021-2025 Ford F-150 Tremor (4WD, gasoline/hybrid powertrains where equipped, without Electronic Suspension, without Off-Road Suspension, without Heavy Payload Package)

Fitment Notes

• Front suspension application; 2x are required for complete front-axle replacement.
• Fits 4WD models only.
• Excludes models equipped with Electronic Suspension/Continuously Controlled Damping.
• Excludes models equipped with the Off-Road Suspension configuration.
• Excludes models equipped with the Heavy Payload Package.
• 2026 Ford F-150 fitment was not verified for KYB 5640021 and is therefore not included.
• Verify exact suspension equipment before installation because F-150 suspension specifications vary by configuration.

Features

• KYB MonoMax performance shock absorber.
• Front axle application for Ford F-150 4WD models.
• Monotube shock absorber construction.
• Designed for high-performance light-truck applications.
• High-pressure gas design provides consistent damping performance.
• 1/2-inch diameter hardened piston rod provides increased strength.
• Large-diameter piston is engineered for durability and damping capability.
• Monotube design provides direct piston response.
• Designed to deliver improved driving control and suspension performance.
• Non-adjustable, application-specific replacement design.

Specifications

• Brand: KYB
• Part Number: 5640021
• Product Line: MonoMax
• Product Type: Gas-pressure monotube shock absorber
• Position: Front
• Side: Left or right front
• Adjustment: Non-adjustable
• Vehicle: Ford F-150
• Platform: Fourteenth-generation F-150
• Model Years Verified: 2021-2025
• Drivetrain: 4WD
• Suspension Restriction: Without Electronic Suspension, Off-Road Suspension, or Heavy Payload Package
• Quantity Required: 2 per vehicle

Included Components

• 1x KYB 5640021 MonoMax front shock absorber

Product Description

The KYB 5640021 MonoMax is a high-performance front shock absorber designed for 4WD Ford F-150 applications. Its monotube construction, high-pressure gas design, large-diameter piston, and hardened 1/2-inch piston rod are engineered to provide strong damping response and durable suspension control for light-truck use.

The 5640021 is cataloged for 2021-2025 F-150 4WD applications when the vehicle is equipped without Electronic Suspension, Off-Road Suspension, or the Heavy Payload Package. Because Ford offers multiple suspension configurations across F-150 trims and packages, the vehicle's exact suspension equipment should be verified before installation. Two units are required for a complete front-axle replacement.