FOX 985-02-157 Perf Series 2.0 IFP Coilover Front 2025+ 4Runner/2024+ GX550 AWD

Vehicle Fitment

• 2025-present Toyota 4Runner (all trim levels: SR5, TRD Sport, TRD Off-Road, TRD Off-Road Premium, Limited, Platinum, TRD Pro, Trailhunter; 4WD) - Confirmed fitment; front coilover
• 2024-present Toyota Land Cruiser 250 (LC250; all trim levels; 4WD) - Confirmed fitment; front coilover
• 2024-present Lexus GX550 (all trim levels: Luxury, Luxury+, Overtrail, Overtrail+, Premium, Premium+; AWD) - Confirmed fitment; front coilover
• Designed for vehicles at stock ride height through 0-2.25" of front lift - confirm your specific lift height is within this range before ordering.

Application Notes

• The 985-02-157 covers the 6th-generation Toyota 4Runner (2025+), 2nd-generation Land Cruiser 250 (2024+), and 3rd-generation GX550 (2024+) under a single part number because all three share the TNGA-F ladder frame platform and essentially identical front suspension geometry - spring perch, strut tower mounting, and lower control arm attachment points are shared across all three vehicles and models. Confirm your specific model year is in the applicable range before ordering.
• This is a front coilover - the coil spring and shock damper are integrated in a single assembly with a threaded spring perch for ride height adjustment. It replaces the factory front strut/spring assembly. Two units are required for a complete front replacement - this listing is for one coilover.
• Top mount is OEM - the 985-02-157 uses the factory upper strut mount location and hardware, making it a direct bolt-on replacement for the factory front strut without modification to the strut tower or upper mount hardware.
• Lift range: 0-2.25". The spring perch threading allows fine adjustment of ride height within this range. At 0" the coilover replicates factory ride height; at 2.25" (maximum threaded position for this spring/shock combination) it achieves the maximum supported front lift. Attempting to exceed 2.25" of front lift with this unit by over-extending the spring perch is not recommended - it compresses usable spring preload and can adversely affect suspension geometry and handling at extreme positions.
• Application-specific valving - the 985-02-157 is calibrated specifically for the front suspension spring rates, geometry, unsprung weight, and target ride behavior of the 4Runner/LC250/GX550 TNGA-F platform. This is not a generic coilover adapted to the vehicle; it is tuned for it.
• Fully serviceable - FOX coilovers can be rebuilt by FOX-authorized service centers. Seals, oil, and internal components are serviceable for a lifetime of use.
• Sold individually - one coilover per order. Two are required for a complete front axle replacement.

Features

• Coilover configuration - the integrated spring-and-shock assembly simplifies installation compared to separate spring and shock components, eliminates the clearance and alignment concerns of using aftermarket shocks with factory springs on a lifted vehicle, and allows ride height to be set precisely by threading the spring perch up or down on the shock body. The spring rate is matched to the shock valving as a system, providing consistent and predictable damping across the supported lift range.
• Internal Floating Piston (IFP) - the IFP is a free-floating piston inside the shock body that separates the shock oil from the high-pressure nitrogen gas charge. In a shock without an IFP, aggressive or sustained off-road use causes the oil and gas to mix, creating air bubbles in the oil (aeration) that cause inconsistent, foamy damping - commonly called shock fade. The IFP physically prevents this mixing, maintaining the oil's incompressibility and the nitrogen's consistent pressure for repeatable damping performance across sustained off-road use. This is the defining feature of the Performance Series over entry-level non-IFP shock designs.
• 2.0" impact-extruded 6061-T6 aluminum body - the aluminum body dissipates heat approximately four times faster than steel-bodied shock alternatives, reducing the rate of temperature rise during sustained use. The larger 2.0" body (vs. the OEM shock's smaller-diameter steel body) provides more oil volume and more heat dissipation surface area. Impact extrusion and CNC machining maintain tight bore tolerances for consistent seal contact and smooth shaft movement.
• Race-developed high-flow damping piston - the piston is designed for high-flow oil movement through the valving shim stacks, providing wide-range damping force control across the full velocity spectrum of suspension inputs - from slow body roll to sharp trail impacts.
• Application-specific valving - shock valving is calibrated for the TNGA-F platform's front spring rates, unsprung weight, and suspension geometry at 0-2.25" of lift, optimizing damping for both on-road comfort and off-road control.
• OEM top mount - direct-fit to the factory upper strut tower; no modification required for installation.
• Fully serviceable - seals and internal components can be replaced by FOX-authorized service centers. Serviceable shocks have a longer effective lifespan than non-serviceable units because worn seals can be replaced rather than discarding the entire shock assembly.
• Extends drop-out travel - the 985-02-157 is designed to maximize droop travel in the 4Runner/LC250/GX550 front suspension, increasing the distance the front wheels can drop before the suspension tops out. More droop travel improves tire contact on uneven terrain and enhances off-road articulation.

Specifications

• Part Number: 985-02-157
• Series: FOX Performance Series 2.0
• Type: Front Coilover IFP Shock
• Vehicle Fitment: 2025+ Toyota 4Runner; 2024+ Toyota Land Cruiser 250 (LC250); 2024+ Lexus GX550 (all trims, AWD/4WD)
• Position: Front
• Lift Range: 0-2.25"
• Body Diameter: 2.0"
• Body Material: 6061-T6 aluminum, impact extruded
• Reservoir Type: Internal Floating Piston (IFP)
• Travel: 6.12"
• Top Mount: OEM (direct-fit factory upper mount location)
• Valving: Application-specific (TNGA-F platform)
• Serviceable: Yes
• Warranty: FOX 1-year limited warranty

Included Components

• 1x FOX 985-02-157 Performance Series 2.0 Front Coilover IFP Shock
• All required mounting hardware

Product Description

The FOX 985-02-157 is the Performance Series 2.0 front coilover IFP shock for the 2025+ Toyota 4Runner (6th generation), 2024+ Toyota Land Cruiser 250 (LC250), and 2024+ Lexus GX550 - all three of which share the TNGA-F ladder frame platform and near-identical front suspension architecture, allowing a single FOX coilover part number to serve all three vehicles across all trim levels. It is a direct-fit front coilover replacement using the OEM upper strut mount location, supporting 0-2.25" of front lift through threaded spring perch adjustment.

The coilover format integrates the spring and damper in a single assembly with a threaded perch for precise ride height setting, replacing the factory strut and spring as a matched unit. The spring rate and shock valving are calibrated together for the TNGA-F platform's front suspension geometry and spring rates across the supported lift range - this is not a generic shock with a generic spring fitted to the vehicle, but a system tuned for how these trucks actually behave when lifted 0-2.25" at the front. The Internal Floating Piston (IFP) separates oil from the nitrogen gas charge inside the shock body, eliminating the aeration that causes conventional shock fade under sustained off-road use. The 2.0" aluminum body provides more oil volume and four times greater heat dissipation than conventional steel-bodied shocks, maintaining consistent damping as shock oil temperature rises during extended use.

For 6th-gen 4Runner owners, the 985-02-157 represents the entry point into the FOX coilover lineup for this platform - a meaningful upgrade over the factory front strut in oil volume, heat management, valving refinement, and supported lift range, at the Performance Series price point. Owners who want additional features - external reservoir, DSC (Dual Speed Compression) adjuster, or greater oil volume - should consider the FOX Performance Elite or Factory Race Series coilovers for the same platform. The 985-02-157 is sold as a single unit; two are required for a complete front replacement. FOX backs it with their standard 1-year limited warranty, and the unit is fully serviceable at FOX-authorized service centers.