AEV FX370 Ford Super Duty: The 37-Inch Off-Road Package Bridging the Gap to Extreme Builds
American Expedition Vehicles (AEV) has officially expanded its heavy-duty lineup with the introduction of the AEV FX370 package for the Ford F-250 and F-350 Super Duty platforms. Positioned strategically between the factory-offered Tremor package and AEV’s extreme, 40-inch-tire FXL build, the FX370 caters directly to owners seeking enhanced off-road performance without the structural compromises of sheet metal trimming.
Available as a comprehensive turnkey upfit starting at $19,999 (excluding the base Ford donor vehicle), the FX370 maintains an OEM-level fit and finish. By optimizing wheel clearance within the factory fender openings, the package delivers significant ground clearance gains while preserving daily-driver usability in urban environments and tight trail spaces.
Exterior Integration: 37-Inch Tires Without Sheet Metal Cutting
The primary distinction between the FX370 and its larger sibling, the FXL, lies in wheel size and body modification requirements. While the FXL relies on massive 40-inch rubber and wide HighMark fender flares that necessitate body cutting, the FX370 utilizes a clean, flare-free architecture.
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| AEV SUPER DUTY PACKAGE COMPARISON |
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| [ AEV FX370 ] --> 37" BFGoodrich KO3s | Factory Wheel Wells |
| 18" Salta Wheels | No Sheet Metal Cut |
| |
| [ AEV FXL ] --> 40" HD-Terrain KTs | HighMark Flares |
| 17" Katmai Wheels | Cut Body Panels |
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Wheel and Tire Hardware
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Tire Specification: BFGoodrich All-Terrain T/A KO3 tires measuring 37×12.50R18.
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Wheel Design: 18-inch AEV Salta alloy wheels engineered specifically to maintain proper scrub radius and offset on heavy-duty Ford axles.
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Body Preservation: Retains factory sheet metal and outer fender lines, preserving structural panel integrity and anti-corrosion factory coatings.
ℹ️ Technical Note: Retaining proper wheel offset on heavy-duty solid axles prevents excessive wear on front wheel bearings and ball joints. Oversized wheel spacers or improper negative offsets shift leverage outward, dramatically shortening front axle component lifespan.
Suspension Geometry and Chassis Dynamics
Fitting 37-inch tires to a heavy-duty truck without causing tire rub or degraded highway handling requires an integrated suspension approach. The FX370 incorporates AEV’s proprietary 4-inch DualSport Suspension System.
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| AEV DUALSPORT SUSPENSION ARCHITECTURE |
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| [ Heavy-Duty Coil Springs ] ---> Calibrated for Gas / Diesel Mass|
| [ Bilstein Shock Absorbers ] -> Custom Valving for Super Duty |
| [ Track Bar Relocation ] ------> Corrects Roll Center Geometry |
| [ Steering Linkage Kit ] ------> Eliminates High-Speed Bump Steer|
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Suspension System Engineering Highlights
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Custom-Valved Bilstein Dampers: Shock absorbers tuned specifically for the spring rates, gross vehicle weight rating (GVWR), and payload distributions of the Super Duty platform.
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Geometrical Steering Correction: Corrected track bar and steering drag-link angles keep linkage geometry parallel to the axle. This prevents bump steer—where suspension travel forcefully shifts the steering wheel on rough surfaces.
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Roll Center Optimization: Raised suspension roll centers reduce body roll in high-speed highway cornering despite the higher center of gravity.
Protection Systems and ADAS Integration
Off-road durability is reinforced through heavy-duty stamped steel bumpers at the front and rear. Unlike fabricated plate-steel alternatives, stamped steel offers increased structural strength-to-weight ratios and smooth, curved outer profiles.
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| STAMPED STEEL BUMPER HARDWARE |
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| [ Front Bumper ] --> Integrated Winch Mount (Up to 16,500 lbs) |
| Auxiliary Lighting Mounting Brackets |
| Retains OEM Radar & Ultrasonic Sensors |
| |
| [ Rear Bumper ] --> High-Clearance Corner Protection Skids |
| Integrated Recovery Points & Trailer Plug |
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Advanced Driver Assistance Systems (ADAS) Compliance
Modern heavy-duty trucks feature complex safety arrays. The FX370’s front bumper incorporates dedicated cutouts and recalibrated bracketry to keep Ford’s factory parking sensors, adaptive cruise control radar modules, and 360-degree camera systems operating within factory tolerances.
⚠️ WARNING: Replacing front bumpers on modern ADAS-equipped vehicles with non-compliant aftermarket units can blind front radar sensors and automatic emergency braking (AEB) cameras, triggering safety fault codes or unintended braking interventions.
Powertrain Options: Gasoline vs. Diesel Considerations
The FX370 package is fully compatible with Ford’s two primary heavy-duty engine options: the 7.3-liter gasoline V8 and the 6.7-liter Power Stroke turbodiesel V8.
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| ENGINE SPECIFICATION MATCH |
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| 7.3L Godzilla V8 Gas | 430 HP / 485 lb-ft Torque |
| | Lighter front end, higher payload |
|----------------------------+--------------------------------------|
| 6.7L Power Stroke Diesel | Up to 500 HP / 1,200 lb-ft Torque |
| | Maximum towing & extended range |
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Technical Powertrain Comparison
| Parameter | 7.3L Gasoline V8 | 6.7L Power Stroke Turbodiesel V8 |
| Horsepower Output | 430 HP | 475 HP – 500 HP |
| Torque Output | 485 lb-ft | 1,050 lb-ft – 1,200 lb-ft |
| Front Axle Mass Impact | Lighter overall weight; lowers front spring compression | Heavier block assembly; requires stiffer front coils |
| Payload Capacity Impact | Higher net payload allowance for slide-in campers | Slightly lower net payload due to engine mass |
| Ideal Application | Low-speed technical crawling, overlanding, high payload | Heavy-duty towing, extreme-range remote expeditions |
The lighter gasoline V8 reduces front axle load, making the truck more agile over soft terrain while preserving payload capacity for heavy bed accessories, slide-in campers, or roof-top tents. Conversely, the 6.7L Power Stroke diesel delivers extreme low-end torque for heavy trailer towing and long-distance driving range.
Interior Touches and Finishing Branding
Inside the cabin, the FX370 adds subtle custom trim details that align with AEV’s factory-tier aesthetic.
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Custom Headrests: AEV logo embroidery integrated directly into the front leather or cloth headrests.
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Exterior Branding: Subdued black-out FX370 bedside graphics and serialized AEV build plaques.
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Spare Tire Integration: A full-size 37-inch spare tire mounted underneath the bed in the factory location, preserving full cargo box volume.
Market Positioning and Pricing Overview
With a starting price of $19,999, the FX370 package costs $6,000 less than the extreme FXL upfit.
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| AEV FORD SUPER DUTY LINEUP |
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| [ Base Ford Super Duty ] --> F-250 / F-350 Donor Vehicle |
| + |
| [ AEV FX370 Package ] --> $19,999 Upfit Base Price |
| = |
| [ Total Build Range ] --> ~$80,000 to $110,000+ Total MSRP |
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By providing severe-terrain capability, factory-level ADAS integration, and 37-inch tires without requiring permanent body cuts, the AEV FX370 establishes a practical benchmark for heavy-duty overland builds.
Source: AEV FX370 macht den Ford Super Duty fit für echte Offroad-Abenteuer!
✍️ Author: Bejenaru Alexandru Ionut – [email protected]
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