FA20 Engine For Sale: A Performance Buyer's Guide

The FA20 platform is a modern marvel, but it has a reputation. Some see it as a fragile engine with weak points, while others know it as a capable powerhouse just waiting to be unlocked. The truth is, both can be correct. A poorly built or maintained FA20 can be a nightmare, but a professionally assembled one is a different beast entirely. If you're looking for an 'fa20 engine for sale', your goal shouldn't just be horsepower—it should be reliable horsepower. This guide cuts through the noise. We'll explore the common failure points, explain how to address them with quality parts, and show you how to choose a build that delivers consistent, dependable performance.

Key Takeaways

• Match the Engine to Your Ambition: Decide if you need a reliable daily driver, a spirited street car, or a track machine. This choice dictates whether you need a stock OEM replacement, a Stage 2 build with stronger internals, or a fully built motor designed for maximum power.
• Prioritize Forged Internals for Power: The stock FA20 connecting rods are the first thing to fail when you add significant power. Before chasing horsepower numbers, invest in a professionally built short block with forged components to create a durable foundation that can reliably handle the extra stress.
• Demand Documentation and a Warranty: A reputable engine comes with proof. Always require a complete build sheet, service records, and parts receipts to verify its quality. A clear warranty protects your investment and is a sign of a trustworthy builder.

What is the FA20 Engine?

If you’ve spent any time in the Subaru world, you’ve definitely heard of the FA20. This 2.0-liter, four-cylinder boxer engine is a modern powerhouse found in some of Subaru's most popular performance models from 2012 onward. As the successor to the legendary EJ series, the FA20 brought new technology to the table, including direct injection, which set a new standard for efficiency and power potential.

The "boxer" design is a Subaru hallmark. It places the cylinders horizontally, so the pistons move toward and away from each other like a boxer throwing punches. This layout gives the engine a flat, low profile, which helps create a lower center of gravity for your vehicle. The result is improved stability and handling, whether you're carving up a canyon road or navigating a tight autocross course. For enthusiasts, the FA20 represents a fantastic platform for building a responsive and capable car, with a massive aftermarket community dedicated to pushing its limits.

Key Specs and Performance

The FA20 engine is known for its versatility, appearing in two primary forms. The naturally aspirated version, the FA20D, is found in the Subaru BRZ and its Toyota/Scion siblings. It produces around 200 horsepower and is celebrated for its sharp throttle response and high-revving nature. The second variant is the turbocharged FA20F, also known as the FA20 DIT (Direct Injection Turbo), which powers the WRX. This version delivers a more aggressive 268 horsepower from the factory and offers a huge ceiling for performance gains through engine tuning services and bolt-on modifications. Both engines share the same 2.0-liter displacement and square bore/stroke dimensions, creating a balanced foundation for reliable power.

Which Subaru Models Use the FA20?

The FA20 engine was a key player in Subaru’s lineup for nearly a decade. You’ll find the turbocharged FA20F engine in the 2015–2021 Subaru WRX and the 2014–2018 Forester XT. These models benefit from the engine's low-end torque and tuning potential, making them incredibly popular platforms for modification. If you're looking for Subaru WRX upgrades, the FA20F provides an excellent starting point. The naturally aspirated FA20D is the heart of the 2013–2020 Subaru BRZ, as well as the Scion FR-S and Toyota 86. Its lightweight and balanced design make these coupes some of the most engaging driver's cars on the market.

Where Can You Buy an FA20 Engine?

Once you’ve decided to get a new FA20, the next step is figuring out where to source it. Your choice will depend on your performance goals and budget. You can find everything from a standard OEM replacement to a fully built motor designed for the track. Each option has its pros and cons, so it’s important to know what you’re looking for before you start shopping. Let’s break down the three main places you can find an FA20 engine for your Subaru.

Crawford Performance Built Motors

If you’re aiming for serious power and reliability, a professionally built motor is your best bet. We specialize in creating high-performance engines ready for demanding applications. Our built FA20 short block is engineered specifically for boosted setups in BRZ, FR-S, or GT86 models, capable of handling up to 660 horsepower. This isn't just a replacement; it's a foundation for a high-performance build. By choosing a built motor, you get a professionally assembled engine with upgraded components designed to withstand the stresses of increased power, saving you the guesswork and potential pitfalls of building it yourself.

Online Marketplaces and Retailers

For those looking for a wider selection or a used engine, online marketplaces can be a valuable resource. Platforms like eBay offer a huge variety of FA20 engine options from different sellers, including used OEM motors, JDM imports, and sometimes even rebuilt units. The main advantage here is the ability to compare prices and potentially find a great deal. You can often find engines with low mileage pulled from donor cars. However, it’s crucial to do your due diligence. Carefully vet the seller, check their ratings, and read the entire description to understand exactly what you’re buying and what kind of warranty, if any, is included.

Authorized Subaru Dealers

If you need a brand-new, factory-spec engine, your most reliable source is an authorized Subaru dealer or a reputable OEM parts supplier. This route guarantees you get a genuine part that is a perfect match for your vehicle. For example, you can find an OEM FA20 DIT Turbo Short Block designed specifically for 2015-2021 WRX models. While this is often the most expensive option, it provides peace of mind knowing the engine is new and meets Subaru's exact standards. This is the ideal choice for a stock replacement or for someone who wants a fresh, reliable starting point for a mild build.

How Much Does an FA20 Engine Cost?

The price of an FA20 engine can vary dramatically depending on what you’re looking for. Costs range from a couple of thousand dollars for a used motor to well over five thousand for a high-performance build. Your budget and power goals will be the biggest factors in determining the final price tag. Whether you need a simple OEM replacement or a fully built engine ready for the track, understanding the different price points is the first step in making a smart purchase. Let's break down the typical costs you can expect for new, used, and performance-built FA20 engines.

New OEM Engine Pricing

If you're looking for a direct, factory-spec replacement, a new OEM (Original Equipment Manufacturer) engine is your most straightforward option. This ensures you get a brand-new motor built to Subaru's exact standards. For example, a new Subaru FA20 DIT Turbo short block for a 2015-2021 WRX typically costs around $2,700. While this is a significant investment, it provides peace of mind with factory reliability. Keep in mind this price is often for the short block alone, meaning you'll still need to account for the cylinder heads, other components, and labor costs to complete the installation.

Used and Rebuilt Engine Costs

For those working with a tighter budget, the used and rebuilt market offers more accessible price points. You can find a wide range of used FA20 engines on online marketplaces, with prices varying based on mileage, condition, and what’s included. While you might find a complete used engine for less than a new OEM short block, this route requires careful vetting. A rebuilt engine can be a solid middle ground, but the quality depends entirely on the builder. Always scrutinize the seller's reputation, ask for a detailed history, and understand the warranty terms before committing.

The Investment for a Performance Build

When your goal is to push past stock power levels, a purpose-built engine is a necessary investment. A standard FA20 has its limits, but a professionally built short block can reliably handle over 600 horsepower. Expect to invest between $5,000 and $6,000 for a pre-built short block designed for high-power applications. This price reflects the cost of forged internals, precision assembly, and the engineering required to handle serious boost. This is more than just a purchase; it's an investment in durable performance parts that will protect your vehicle when you push it to its limits.

What to Look For When Buying an FA20

Once you’ve decided on a budget, the real search begins. Finding the right FA20 isn’t just about price; it’s about getting a solid foundation for your performance goals. Whether you're buying a used OEM engine or a fully built motor, paying close attention to the details will help you make a smart investment and avoid costly surprises down the road. A thorough evaluation of the engine's history, the seller's policies, and its compatibility with your car is essential. Think of it as a pre-purchase inspection for the heart of your Subaru.

Check the Engine's Condition and Mileage

The history of an engine tells a story, and mileage is a key chapter. You’ll find used FA20s with a wide range of mileage, from under 10,000 to over 75,000. For a simple drop-in replacement, lower mileage is generally safer. However, if you’re planning a full performance build, a higher-mileage engine can be a cost-effective starting point since you’ll be replacing the internal components anyway. The most important thing is to get a clear history and assess the overall condition. A well-maintained engine with higher mileage is often a better bet than a low-mileage one that was abused or poorly maintained.

Review Warranty and Return Policies

Never complete a purchase without understanding the seller’s warranty and return policy. Many private sellers or online marketplaces offer limited protection, sometimes as short as 30 days, and may charge a hefty restocking fee for returns. This is where buying from a reputable builder makes a difference. For example, we stand behind our work with a comprehensive 12-month/12,000-mile warranty on our built engines. This kind of guarantee provides peace of mind and protects your investment, ensuring you receive a motor that’s ready for the demands of high-performance driving and reflects the quality of the build.

Confirm Compatibility with Your Subaru

Not all FA20 engines are created equal. The FA20DIT found in the 2015-2021 WRX is a direct-injected turbo engine, while the FA20D in the BRZ/FR-S/86 is naturally aspirated with a different fuel system and compression ratio. It is critical to confirm that the engine you’re buying is the correct variant for your specific model. Always double-check part numbers and consult with the seller to ensure compatibility. An incorrect engine can lead to major installation headaches and performance issues. If you have any doubts, it’s always best to consult with experts who specialize in Subaru WRX upgrades and other models.

Plan for Shipping and Inspection

An engine is a large, heavy, and sensitive piece of equipment, so logistics matter. Before buying, confirm shipping costs and timelines. When the engine arrives, inspect the crate for any external damage before you sign the delivery receipt. Once you accept it, immediately uncrate the engine and check for any signs of damage that may have occurred in transit, like cracks in the block or broken sensors. Take photos of everything. Most sellers have a short window for reporting shipping damage, so you need to act quickly. Planning for a smooth delivery and thorough inspection ensures you can address any issues right away.

Stock vs. Performance: Choosing Your FA20 Build

Deciding on a new FA20 engine isn't just about replacing a part; it's about defining your Subaru's future. The path you choose depends entirely on your goals, your budget, and how you plan to use your car. Are you looking for a reliable daily driver, a spirited weekend car, or a dedicated track machine? Each goal requires a different approach to the engine build. Thinking through your needs now will save you from potential headaches and extra costs down the road. Let's break down the three main paths you can take, from a simple factory replacement to a fully built powerhouse. Understanding these options will help you invest in an engine that perfectly matches your driving ambitions and gives you confidence every time you turn the key.

Option 1: OEM Replacement

If your primary goal is to restore your Subaru's factory performance and reliability, an OEM replacement is your most direct route. This option is perfect for daily drivers or for owners who were perfectly happy with the stock power levels before their original engine failed. The Subaru FA20 engine was engineered for a great balance of efficiency and performance right out of the box. Choosing an OEM replacement means you get a known quantity—an engine built to the manufacturer's exact specifications, ensuring a seamless fit and predictable behavior. It’s the simplest way to get your car back on the road without introducing the complexities and costs of performance modifications.

Option 2: Stage 1 & 2 Performance Builds

For the enthusiast who wants more power without sacrificing everyday usability, a Stage 1 or Stage 2 build is the ideal middle ground. This approach involves strengthening the FA20's known weak points by replacing factory components with durable, aftermarket performance parts. Typically, this means upgrading the stock pistons and connecting rods to forged alternatives that can safely handle more power. A well-executed Stage 2 build can reliably push your WRX or BRZ into the 400-450 horsepower range, transforming your driving experience. This is the perfect choice for spirited street driving and occasional track days, offering a significant performance gain while maintaining a degree of civility for regular use.

Option 3: Fully Built High-Performance Engines

When maximum performance is the only thing that matters, a fully built, high-performance engine is the ultimate solution. This path is for serious competitors and enthusiasts building a dedicated track or race car. A professionally constructed FA20 short block can handle over 600 horsepower, but achieving that number reliably is the real goal. A true performance build is about more than just a peak horsepower figure; it’s about creating a robust, balanced system that can withstand extreme stress lap after lap. This requires meticulous assembly, top-tier components, and precise engine tuning services to ensure the entire package works in harmony, preventing costly failures when you’re pushing the limits.

Common FA20 Engine Problems to Know

Every engine platform has its own set of quirks, and the FA20 is no different. Knowing what to watch for can save you a lot of headaches and help you make a smarter purchase. Whether you're buying a used stock motor or a fully built performance engine, understanding these common issues will prepare you for ownership and help you identify a solid investment. Think of this as your pre-flight checklist before you commit. A well-maintained and properly modified FA20 is a fantastic powerplant, but a neglected one can become a project you didn't sign up for. Let's go over the key areas to pay attention to so you can buy with confidence and get the most out of your Subaru.

Oil Consumption and Carbon Buildup

One of the most talked-about issues with the FA20 is its tendency to consume oil, particularly when driven hard. It's critical to keep a close eye on your oil levels between changes to prevent running low, which can lead to serious engine damage. This oil consumption can also contribute to carbon buildup on the intake valves, a common trait of direct-injection engines. Over time, this can restrict airflow and reduce performance. Installing a quality Air/Oil Separator is one of the best preventative performance parts you can add to mitigate both of these issues, keeping your engine cleaner and running more efficiently.

Weak Points: Rods and Internals

The stock FA20 engine is reliable for daily driving, but its connecting rods are a known weak point when you start adding significant power. If you’re planning for major horsepower gains, upgrading the factory internals is not just a suggestion—it’s a necessity. There's a common misconception that built FA20 engines are fragile. However, when they are properly maintained and constructed with quality forged parts, they can perform reliably and handle substantial power. Investing in a professionally built short block with forged rods and pistons is the foundation for any serious Subaru WRX upgrade plan, ensuring your engine can handle the extra stress from a larger turbo and aggressive tune.

Red Flags When Buying a Used Engine

When you're looking at a used FA20, especially one that's already been modified, proceed with caution. A major red flag is a seller who can't provide a detailed service history or receipts for performance work. Be wary of the idea that a built motor doesn't require careful maintenance; it often requires more. Inspect the engine for any signs of oil leaks, coolant residue, or sludge under the oil cap. Ask about its history, who built it, and who tuned it. A vague answer is not a good sign. Proper engine tuning services are essential for engine health, so an unknown or questionable tune can be a deal-breaker.

How to Verify an FA20's Quality

When you’re investing in a performance engine, you need to do more than just kick the tires. Verifying the quality of an FA20, especially a built motor, requires a close look at its history, components, and the terms of the sale. A shiny engine block can hide a multitude of problems, so your best tools are documentation and a healthy dose of skepticism. A well-documented engine from a reputable builder will always be a safer bet than a mystery motor with a verbal-only history.

The goal is to find an engine that was built correctly and cared for meticulously. This means digging into the paperwork, understanding its service history, and clarifying every detail of the transaction before any money changes hands. Taking these steps protects your investment and ensures you get the reliable power you’re paying for. A great build is a combination of quality parts, expert assembly, and diligent maintenance, and it’s your job as the buyer to verify all three.

Key Inspection Points and Paperwork

There’s a common misconception that built FA20s are fragile, but this isn't true if they are properly maintained and assembled with quality components. The proof is in the paperwork. When evaluating an engine, ask the seller for a complete build sheet that lists every single component used, from the pistons and rods to the bearings and head studs. This document is your primary tool for verifying the quality of the internal performance parts.

Beyond the build sheet, request receipts for the parts and any machine work performed. This confirms the components are what the seller claims they are and shows that the work was done by a professional shop. If the engine has been run, ask for dyno sheets, which provide a real-world look at its performance and the stability of the tune. An organized seller with comprehensive documentation is usually a sign of a well-cared-for engine.

Reviewing Service and Maintenance Records

Careful maintenance is crucial for the longevity of any FA20 engine, and a performance build demands an even higher level of attention. A thorough review of service records gives you insight into how well the engine has been cared for since it was built. You’re looking for a consistent history of oil changes with high-quality synthetic oil, regular fluid checks, and a log of any adjustments or repairs.

Ask for receipts from shops or a detailed log if the owner performed the maintenance themselves. An engine with a spotty or non-existent service history is a major red flag. This history also tells you if the engine received professional engine tuning services, which are essential for ensuring a built motor runs safely and reliably. Don’t just take the seller’s word for it; documentation is the only way to confirm the engine’s past.

Understanding Core Exchanges and Returns

When buying a built engine from a professional builder, you’ll likely encounter a core charge. Some builders require a deposit (the core fee) for your old engine block, which is refunded once you send it back. It's important to clarify this before purchasing to avoid any surprise costs. Ask the seller for the exact terms of the core exchange. How long do you have to return your old engine? What condition must it be in to receive a full refund?

You should also find out who is responsible for the shipping costs of the core, as this can be a significant expense. Understanding these details ensures a smooth transaction and helps you budget accurately for your new engine. A reputable builder will have a clear and fair core policy, so don't hesitate to ask for all the details upfront.

Top Performance Upgrades for the FA20

The stock FA20 is a solid engine, but if you’re looking for serious power, you’ll need to go beyond the factory setup. A successful build isn’t about slapping on the biggest turbo you can find; it’s about creating a balanced system where every component works together to achieve your goals. A thoughtful approach ensures your engine is not only powerful but also reliable for the long haul, whether you're carving corners on the track or navigating a remote trail. To get the most out of your FA20, you need to address its limitations in three key areas: the engine internals, the fuel and air delivery systems, and the cooling system. Each of these areas builds upon the last, creating a strong foundation for dependable performance. Neglecting one area while focusing on another is a recipe for disaster, leading to premature wear or catastrophic failure. By upgrading these systems strategically, you can transform your Subaru into a finely tuned machine that delivers consistent power when you demand it. We have a wide selection of performance parts to help you build the engine you've envisioned, from mild street builds to full-on race applications. Let's walk through the key upgrades that will take your FA20 to the next level.

Strengthening the Internals

Before you chase high horsepower figures, you have to build a strong foundation. The FA20’s stock pistons and connecting rods are the primary weak points when you start adding significant power. To create a reliable high-power engine, replacing these with forged versions is non-negotiable. There’s a myth that built FA20s are fragile, but that’s only true if they’re built or maintained improperly. When you start with high-quality forged internals, you create an engine that can safely handle the increased stress and power you plan to throw at it. This is the essential first step for any serious performance build, ensuring your engine can withstand the demands of increased cylinder pressure and higher RPMs without compromise.

Upgrading the Turbo and Fuel System

Once your engine’s internals are fortified, you can focus on making more power. This means getting more air and fuel into the cylinders. The stock fuel system can become a bottleneck, especially if you’re aiming for more than 450 horsepower. To overcome this, you’ll likely need a secondary fuel system, like port injection, to deliver the necessary volume. Of course, you’ll also need a larger turbo to supply the extra air. To manage the increased stress, you may also need to reinforce the block and upgrade the cylinder heads for better airflow. These modifications require professional engine tuning services to ensure everything works in harmony and your air-fuel ratios are dialed in perfectly for safe, reliable power.

Improving Cooling and Support Systems

More power generates more heat—it’s a simple fact. The factory cooling system is designed for stock output and can quickly become overwhelmed in a performance application. To protect your investment and maintain consistent power, upgrading your cooling system is critical. Installing a larger radiator and a dedicated engine oil cooler will help manage temperatures and prevent overheating during aggressive driving or track days. These supporting systems are just as important as the power-adding parts. They ensure your engine runs reliably, especially for demanding applications like our overlanding solutions, where dependability is everything. Don't let excessive heat rob you of performance or, worse, damage your newly built engine.

Installing Your New FA20 Engine

Once you have your new FA20 engine, the next critical phase is installation. This step is just as important as selecting the right build, as a poor installation can undermine even the highest quality engine. Proper installation ensures your investment performs as expected and remains reliable for years to come. It’s about more than just swapping parts; it’s about integrating the new heart of your Subaru correctly so it can handle the power you plan to unleash.

What to Expect for Labor and Costs

The cost of installing an FA20 engine can vary significantly based on the complexity of your build and the shop you choose. A straightforward swap of a stock engine will be on the lower end of the spectrum, typically involving a set number of labor hours. However, if you’re installing a high-performance built motor, the process becomes much more involved.

A properly built FA20 short block can handle over 600 HP, but achieving that requires more than just dropping the engine in. The installation will involve fitting upgraded components, potentially custom fabricating parts, and ensuring every system works in harmony. This additional complexity increases labor time and, consequently, the cost. When getting quotes, be sure to find a reputable shop with proven experience in Subaru performance builds. Their expertise is worth the investment.

Essential Supporting Parts and Tuning

A high-performance engine is only as strong as its weakest link. Upgrading supporting systems like cooling, fuel, and oil management is just as important as upgrading the engine's internal parts. Your stock components were designed for stock power levels and will quickly become overwhelmed by the demands of a built motor. Before installation, you need to plan your build based on how much power you want and how you'll use the car.

Key upgrades to consider include a higher-flow fuel pump and injectors, an upgraded radiator, and a robust oil cooling system. An Air/Oil Separator is also a non-negotiable addition to protect your engine from oil blow-by. You may also need to strengthen your drivetrain with a new clutch and flywheel to handle the increased torque. Once all the hardware is installed, professional engine tuning services are essential. A tuner will recalibrate your ECU to optimize performance and ensure the engine runs safely with its new set of performance parts.

Professional vs. DIY Installation

While a DIY engine installation can be a rewarding project for an experienced mechanic with the right tools, it’s a massive undertaking. For most owners, especially those investing in a high-performance built engine, professional installation is the recommended path. Building an engine isn't just about getting a high horsepower number; it's about making the engine strong enough to handle that power reliably.

Professional installers have the specialized tools and experience to handle the unique challenges of the FA20 platform. They can troubleshoot unexpected issues, ensure every bolt is torqued to spec, and provide guidance on the critical engine break-in process. A common misconception is that a built motor doesn't require careful maintenance, but the opposite is true. A professional shop will set you up for success with a solid installation and clear instructions for long-term care, often backed by a labor warranty for added peace of mind.

Related Articles

• Built FA20 Engine: Power, Cost & Top Builders
• Ultimate Guide to Subaru Engine Upgrades
• Subaru Engine Mods: 7 Best Upgrades to Boost Performance
• 4 Mods to Boost FA20 Engine Reliability

Frequently Asked Questions

Is a built FA20 engine reliable enough for a daily driver? Absolutely. There's a common myth that a built engine is only for the racetrack, but that isn't the case. Reliability comes down to the quality of the build, the tune, and the maintenance. A professionally assembled engine using high-quality forged internals is significantly stronger than a stock one. When paired with a conservative, professional tune and diligent maintenance, a built FA20 can be a perfectly dependable engine for your daily commute while still having plenty of power on tap for the weekend.

What's the difference between a short block and a long block? This is a great question that often causes confusion. Think of a short block as the bottom half of the engine; it typically includes the engine block itself, crankshaft, connecting rods, and pistons. A long block includes the entire short block plus the top half of the engine, which means the cylinder heads, camshafts, and valvetrain are already assembled and attached. Knowing the difference is key when you're shopping, as it determines how many of your old engine's parts you'll need to transfer over.

Why is an Air/Oil Separator (AOS) so critical for the FA20? The FA20 is a direct-injection engine, which means fuel is sprayed directly into the cylinder instead of washing over the intake valves. Because of this, oil vapor from the crankcase can get recirculated into the intake and bake onto the valves, causing carbon buildup that hurts performance. An Air/Oil Separator intercepts this vapor, separating the oil and returning it to the engine, which keeps your intake valves clean and reduces overall oil consumption. It's one of the most important supporting mods you can make for engine health.

Can I put the turbocharged FA20F from a WRX into my BRZ? While it might sound like a straightforward swap since they share the "FA20" name, it's a very complex and expensive project. The WRX and BRZ engines have different fuel systems, wiring harnesses, and engine computers (ECUs). Making them work together requires extensive custom fabrication and electronic work. For most owners, it's far more practical and cost-effective to add a turbo or supercharger kit to the existing BRZ engine, especially if you've already strengthened it with a built short block.

How important is the engine break-in process? The break-in period is the most critical time in your new engine's life. This process allows the new piston rings to properly seat against the cylinder walls, which is essential for creating strong compression and ensuring the engine's long-term health and performance. Skipping or rushing this step can lead to excessive oil consumption and reduced power down the road. Always follow the specific break-in instructions provided by your engine builder, as they will have a precise procedure of varying engine loads and oil changes to ensure everything settles in perfectly.