You're looking at our current inventory of FB25 JDM engines and related parts — all sourced directly from Japan and processed through our Colorado facility. Whether you're rebuilding a Subaru or chasing a reliable replacement engine, this page shows every FB25 listing we have available right now.
The FB25 is a 2.5-liter naturally aspirated flat-four found in a range of Subaru models, and it's a popular choice for a direct-fit swap or OEM-quality replacement. Browse the listings above and reach out if you need help matching a unit to your specific application.
The FB25 is a 2.5-liter horizontally opposed (boxer) four-cylinder engine produced by Subaru. It replaced the older EJ25 platform and introduced a revised cylinder head design, direct-acting valve train, and improved fuel efficiency. It's a naturally aspirated engine and was fitted to several Subaru models including the Legacy, Outback, Forester, and Impreza across various model years.
JDM-spec FB25 engines come from the Japanese domestic market, where vehicles often accumulate lower mileage due to Japan's strict vehicle inspection system (shaken). This makes JDM units a popular choice for buyers who want a cleaner, fresher engine without paying for a brand-new crate motor. The core engine architecture is shared with USDM vehicles, which simplifies fitment in most applications.
Before purchasing, confirm the model year of your Subaru and whether your vehicle uses any specific ancillary components (sensors, brackets, or accessories) that may or may not be included. Review each listing carefully, and don't hesitate to contact us — our team can help you verify compatibility before you buy.
In most cases, yes — the FB25 is a direct or near-direct replacement for vehicles that originally came equipped with this engine. Fitment can vary depending on model year and trim level, so we recommend confirming your vehicle's build date and existing engine code before ordering. Our team is happy to assist with compatibility questions.
Yes. All engines sold by Colorado JDM Motors are inspected and tested at our US facility as part of our quality assurance process. We do not simply pass imported units straight through without evaluation.
Extended warranty coverage is available on select products. Warranty terms vary by listing, so please review the specific product page or contact us for details on what is included with the unit you're interested in.
Free shipping is available on select products. Check the individual listing you're interested in to see whether it qualifies, or ask us directly when you inquire.
Each listing in our inventory is numbered and may include different configurations or included components. If you're unsure which unit suits your build or repair, reach out to our team with your vehicle's year, model, and current engine code — we'll point you in the right direction.
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