What body sizes are available on the E-Series?
Four: E-138s and E-138 on the E-350, and E-158s and E-158 on the E-350/E-450 — roughly 73 to 92 sq ft of walkable floor, all with a 7-foot interior height and 36-inch cab-over. See the spec table above.
Platform · Ford E-Series 4x4
Ford E-450 & E-Series 4x4 Composite Camper Bodies
Foundation builds purpose-built composite camper bodies on the Ford E-Series cutaway chassis, the E-350 and E-450, for buyers looking for a Ford E-450 camper, an E-450 4x4 camper or an E-Series expedition camper. The E-Series carries the same interior sizes as our van bodies, but on the Ford E-Series cutaway — a body-on-frame chassis with an aftermarket 4x4 conversion available. Ford’s 7.3-litre “Godzilla” gas V8 makes 325 hp and 450 lb-ft, it’s rated up to 14,500 lb GVWR, and it carries a 40-gallon tank. On our Zero-Torsion subframe with 22° of articulation, the frame flexes over the terrain while the subframe absorbs the twist, so the composite body stays square with far less of that load passed into it.
At a glance
The Ford E-Series 4x4 platform in brief
- Chassis
- Ford E-Series E-350 / E-450 Cutaway
- Bodies
- E-138s · E-138 · E-158s · E-158
- Engine
- Ford 7.3L “Godzilla” gas V8 — 325 hp / 450 lb-ft
- Max GVWR
- Up to 14,500 lb
- Fuel
- 40-gallon tank
- Subframe
- Zero-Torsion, 22° of articulation
- 4x4
- Aftermarket 4x4 conversion available
Specifications
Ford E-Series 4x4 body sizes
| Model | Chassis | Wheelbase | Overall length | Walkable floor | Max GVWR | Fuel |
|---|---|---|---|---|---|---|
| E-138s | Ford E-Series 350 Cutaway | 138" | 19' | 73 sq ft | 11,500 lb | 40 gal |
| E-138 | Ford E-Series 350 Cutaway | 138" | 20'3" | 82 sq ft | 11,500 lb | 40 gal |
| E-158s | Ford E-Series 350/450 Cutaway | 158" | 20'3" | 82 sq ft | 14,500 lb | 40 gal |
| E-158 | Ford E-Series 350/450 Cutaway | 158" | 21'9" | 92 sq ft | 14,500 lb | 40 gal |
Download the full 2026 spec pack (every body size, dimension, option, and warranty) from the Platforms page.
An E-450 cutaway camper with a purpose-built composite body
An E-Series cutaway is a cab with a bare frame behind it. Foundation replaces the conventional cargo body with an insulated composite camper body — flat, square walls, a 7-foot interior height, a 36-inch cab-over and a full passthrough to the cab — and installs it on the chassis as the final-stage manufacturer. It is the same composite body construction used on the Transit and Sprinter, mounted on the heavier-duty E-Series chassis.
Foundation currently offers four E-Series bodies: the E-138s and E-138 on the E-350, and the E-158s and E-158 on the E-350/E-450, with up to 14,500 lb GVWR on the E-158 bodies. Payload depends on the finished vehicle, so we size the weight discussion around your chassis and build. If you are weighing the E-450 against the other cutaways, start with our guide to the Ford E-450 vs Transit vs Sprinter expedition camper, and see box van and cutaway camper bodies and the composite camper body for how the approach works.
Can a Ford E-Series be converted to 4x4?
Yes. The E-Series is a body-on-frame chassis, which makes it well suited to a proper 4x4 conversion — a suspension lift, transfer case, and large all-terrain tires — done by a specialist 4x4 conversion partner. We build on both the E-350 and the E-450, and the same conversion turns either into an off-road-oriented expedition van, with low-range gearing, larger tires and added ground clearance. Foundation coordinates the chassis and builds and installs the composite body; the 4x4 conversion is performed by the conversion provider.
Why an E-450 instead of a Transit or Sprinter
The E-Series is the choice when you want to go further off pavement and carry more. The body-on-frame design takes a real 4x4 conversion; the Godzilla gas V8 is rated at 450 lb-ft for heavier builds and grades; and up to 14,500 lb GVWR plus a 40-gallon tank give more chassis rating and fuel capacity for heavier, longer trips. It also suits a mobile-work fleet as well as a four-season expedition camper.
E-350 versus E-450: what changes
Both take the same Foundation body. The E-450 steps up the chassis rating for more payload — our E-158s and E-158 bodies are offered up to 14,500 lb GVWR — while the E-350 (E-138s / E-138) is the lighter, more maneuverable base. Choose by how much you’ll carry and how long a body you need; the spec table above lays out each.
How the body is mounted, and what the subframe does
A body-on-frame chassis twists over rough ground. Bolt a rigid box straight to it and that twist cracks walls and springs doors. Our Zero-Torsion subframe sits between the chassis and the body and pivots, allowing up to 22° of articulation — the frame flexes over the terrain while the subframe absorbs the twist, so the composite habitat stays square with far less load passed into it. The subframe structure is corrosion-protected. Read what a torsion-free camper subframe is for the engineering behind it.
Real builds
Featured Ford E-Series 4x4 builds
Common questions
Ford E-Series 4x4 — questions people ask
What engine does the E-Series use?
Ford’s 7.3-litre “Godzilla” gas V8, making 325 hp and 450 lb-ft, run on gasoline.
Can another interior builder finish the vehicle?
Yes. Foundation completes the vehicle as the final-stage manufacturer and provides the documentation required for titling and registration, so you can outfit it yourself or hand it to any professional builder for the interior.
What does the 22° articulation figure mean?
It is how much the Zero-Torsion subframe lets the chassis twist relative to the body off-road. That controlled flex is what keeps the rigid composite habitat from taking the stress of the frame twisting, so walls and seals last.
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