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Swap Kits for the Ford EcoBoost

EcoBoost swap and conversion kits — engine mounts, wiring harnesses, and adapters for dropping a 2.7 or 3.5 EcoBoost into Broncos, older trucks, and custom builds.

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Dropping a 2.7 or 3.5 EcoBoost into a Bronco, an older F-series, or a custom build is one of the most rewarding — and most detail-heavy — swaps in the Ford world. Unlike a bolt-on, a swap lives or dies on the supporting parts: engine and transmission mounts that locate the powertrain correctly, a standalone or adapted wiring harness that keeps the PCM happy, and the cooling, fuel, and exhaust routing to make a modern twin-turbo V6 fit a chassis Ford never designed for it. This category collects the mounts, harnesses, and adapters that turn an EcoBoost long-block into a running, driving swap.

The single biggest decision is which engine and which donor year you build around, because it dictates the harness, the accessory drive, and the electronics you have to keep alive. Get the generation and platform right first, then source the swap hardware to match — a mismatched harness or the wrong mounts will cost you far more time than the parts themselves. Treat a swap as a planned project, not a parts-cart checkout.

Find swap kits on eBay Motors

Used, OEM, and hard-to-find swap kits for the EcoBoost — live listings, prices set by the seller.

Parts in Swap Kits

What to know before you buy

Match the harness to the donor

The wiring harness and PCM are the hardest part of any EcoBoost swap. Build around a known donor year and keep the matching harness, PCM, and immobilizer bits together — mixing generations creates communication faults that are miserable to chase.

Mounts locate everything else

Engine and transmission mounts set the driveline angle, hood clearance, and where the exhaust and intake have to route. Confirm the mount kit is made for your exact chassis before ordering downstream parts.

Plan cooling and charge routing early

A twin-turbo V6 makes real heat. Sort the intercooler plumbing, radiator, and charge-pipe routing into the swap plan up front rather than improvising them after the engine is in the bay.

Related EcoBoost guides

Swap Kits: FAQ

Is the 2.7 or 3.5 EcoBoost better for a swap?
The 2.7 is lighter and more compact, which helps in tight engine bays, while the 3.5 makes more power and torque and has deeper aftermarket support. Choose based on the chassis you are swapping into and the power target — our 2.7 vs 3.5 guide breaks down the trade-offs.
What is the hardest part of an EcoBoost swap?
The wiring harness and PCM integration. Sourcing a complete donor harness that matches your engine's generation, and keeping the immobilizer and CAN network happy, is where most swap projects stall. Plan the electronics before you buy mounts.
Do I need a specific transmission for an EcoBoost swap?
The engine is designed to run with Ford's matching automatic (the 6R80 or 10R80 depending on year), and keeping the factory pairing simplifies the PCM and shift control. Adapting a different transmission is possible but adds control and bellhousing complexity.