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Subaru Engine Swap Compatibility Chart

Subaru Engine Swap Compatibility Chart

A Subaru engine swap compatibility chart is a reference guide that can be used to identify which engines are compatible with certain Subaru models. The chart includes information about the specific year, make, and model of the vehicle, as well as details about the type of engine that it requires for replacement or upgrade purposes.

It may also include additional data such as the size and type of transmission needed, along with other pertinent details related to making a successful engine swap.  

Here is a general engine swap compatibility chart for Subaru vehicles: what Subaru engines are interchangeable-

Subaru ModelCompatible Engine Swaps
Impreza (1993-2007)EJ20, EJ22, EJ25
Impreza (2008-2014)EJ25, EJ20, FA20
WRX (2002-2014)EJ20, EJ25, FA20
WRX STI (2004-2014)EJ20, EJ25
BRZ (2013-2021)FA20, FA24
Legacy (1990-2009)EJ20, EJ22, EJ25
Legacy (2010-2014)EJ25, EJ20, FA20
Forester (1998-2010)EJ20, EJ22, EJ25
Forester (2011-2013)EJ25, EJ20, FA20
Forester (2014-2018)FA20, FA24

This chart helps ensure that drivers use only parts and components designed specifically for their particular vehicle when attempting an engine change or modification project.

Subaru engine swaps are becoming increasingly popular among car enthusiasts, and having a compatibility chart can be very helpful in determining the best fit for your vehicle. A Subaru engine swap compatibility chart can be used to compare different models of engines and their compatible components. 

Subaru Engine Swap Guide

  • Engine compatibility: Some Subaru engines are more easily interchangeable than others. For example, most engines in the EJ series (such as the EJ20, EJ22, and EJ25) are generally compatible with each other. However, newer engines such as the FA20 and FB20 may require more modifications to fit into older vehicles.
  • Transmission compatibility: The transmission that came with your original engine may not be compatible with your new engine, so you may need to swap it out as well. Additionally, some engines may require specific types of transmissions to work properly.
  • Wiring compatibility: Wiring can be a major hurdle when doing an engine swap. The wiring harness for your new engine may need to be modified or replaced to work with your vehicle’s existing wiring.
  • ECU compatibility: The engine control unit (ECU) for your new engine may need to be reprogrammed to work with your vehicle’s existing ECU or replaced entirely.
Subaru Engine Swap Guide

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Subaru 2.5 Engine Interchange

The Subaru 2.5 engine is a popular choice for many vehicles, and due to its interchangeability, it can be easily swapped out between different models.

This makes the 2.5 engine an ideal option for aftermarket customization or replacement parts options, as it allows owners to make their vehicle more powerful without needing to switch out the entire powertrain. Additionally, there are plenty of aftermarket kits available that allow the 2.5 engine to be adapted into other cars with minimal effort and expense.

Subaru Forester Engine Swap Compatibility Chart

The Subaru Forester is a popular all-wheel drive vehicle, and one of the most commonly asked questions about it is what engine swaps are compatible with its model. Thankfully, there is an official compatibility chart available from Subaru that outlines which engines can be swapped into a given year of the Forester.

This chart provides helpful information for anyone considering swapping out their current engine in exchange for something more modern or powerful.

What Engines Fit in a Subaru Impreza

The Subaru Impreza is equipped with either a 2.0-liter four-cylinder engine or a 2.5-liter four-cylinder engine, both of which provide excellent fuel economy and performance for the vehicle.

There are also aftermarket engines that can be used to upgrade your Impreza’s power, such as turbocharged versions of either size engine or larger displacement motors like the EJ25 from the WRX/STi models. 

Best Engine Swap For Subaru Wrx

The best engine swap for a Subaru WRX is the EJ20 or EJ25 engine. These engines are renowned for their power and torque, as well as their reliability and ease of installation. The EJ20 has improved fuel economy over its predecessor, while the larger displacement of the EJ25 provides greater low-end torque. 

Subaru Engine Swap Kit

A Subaru engine swap kit is the perfect solution for those looking to get more power out of their vehicle. This kit includes all the necessary components needed to complete a successful engine swap, such as an adapter plate, mounting hardware, wiring harnesses, and other vital parts.

With these kits, you can easily upgrade your car’s engine to one with higher performance output without having to start from scratch. For more 2jz subaru swap kit look here.

Subaru Engine Swap Kit

Subaru Engine Swaps

Subaru engine swaps are becoming more popular as Subaru owners look for ways to upgrade their vehicles’ performance. Engine swaps involve replacing an existing engine with a different one, usually from another make and model of vehicle, in order to increase power output or efficiency.

Subarus are renowned for their reliability and versatility, making them excellent candidate for engine swaps that can provide powerful results without sacrificing dependability.

The popularity of the Subaru brand has made it easier than ever to find aftermarket parts needed to complete any type of swap, from basic bolt-on upgrades to full-on rebuilds.

Subaru 2.5 to 2.0 Swap

The Subaru 2.5 to 2.0 swap is a popular engine modification that involves replacing the stock 2.5-liter engine with a higher performance, lower displacement version of the same engine – usually a 2.0-liter Boxer four-cylinder engine from later model Subarus such as the WRX or STI models.

This swap offers increased horsepower and torque, improved fuel economy, and more efficient cooling due to its smaller size compared to the original powerplant.

  1. Compatibility: The 2.0 and 2.5 engines are not interchangeable between all Subaru models. Make sure that the 2.0 engine you are planning to use is compatible with your car’s transmission, wiring, and electronics.
  2. Wiring and ECU: The 2.0 and 2.5 engines have different wiring harnesses and Electronic Control Units (ECUs). You will need to use the ECU and wiring harness from the 2.0 engine or modify the existing wiring to work with the new engine.
  3. Exhaust: The exhaust systems for the 2.0 and 2.5 engines may be different. Make sure that the exhaust system from the 2.0 engine will fit with your car’s exhaust system or modify the exhaust system to fit.
  4. Cooling system: The cooling system for the 2.0 and 2.5 engines may be different. Make sure that the cooling system from the 2.0 engine will fit with your car’s cooling system or modify the cooling system to fit.
  5. Fuel system: The fuel systems for the 2.0 and 2.5 engines may be different. Make sure that the fuel system from the 2.0 engine will work with your car’s fuel system or modify the fuel system to work with the new engine.
  6. Transmission: If the transmission from the 2.5 engine is not compatible with the 2.0 engine, you will need to either swap in a transmission from a car that came with a 2.0 engine or modify the existing transmission to work with the new engine.

Best Subaru Engine Swaps

The Subaru engine is a reliable, powerful, and versatile motor that lends itself well to engine swaps. In fact, it’s one of the most popular engines for swaps because its boxer design allows for easy installation in many different types of cars.

Some of the best Subaru engine swaps include using a turbocharged WRX or STI motor into an older Impreza or Legacy model, swapping out a flat-four EJ25 2.5L with an upgraded EJ20 2.0L turbocharged version from an STI, and replacing a naturally aspirated EJ22 with the more powerful turbocharged EJ20 found in later model Subarus.

Best Subaru Engine Swaps

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Subaru engine swap cost

On average, it costs between $3,000 and $5,000 to replace an engine.

How Do I Know If My Engine is Compatible?

If you’re looking to determine whether an engine is compatible with your vehicle, the most important factor to consider is the size and type of engine.

Make sure that the engine you are looking at will fit both physically and electrically into your vehicle’s existing mounting brackets. Additionally, be sure to check for any compatibility issues between your vehicle’s other components (such as exhaust systems or fuel lines) and the new engine.

It may also be necessary to obtain specific parts such as air filters, spark plugs, oil filters, etc., designed specifically for use with the new engine. 

What is a 2.5 I Engine in a Subaru?

The 2.5i engine is a 4-cylinder, horizontally opposed “boxer” style motor found in many Subaru vehicles. It has been around since the early 1990s and was first used in the Subaru Impreza model. The 2.5i engine produces up to 170 horsepower and 174 lb-ft of torque while being relatively lightweight and fuel efficient.

This makes it an ideal option for drivers who want a reliable powertrain with great performance capabilities but still want good fuel economy ratings. Additionally, this particular type of engine is known for its durability and longevity, making it an excellent choice for those looking for something that will last over time without requiring too much maintenance or repair work down the road.

What is a 2.5 I Engine in a Subaru

What is the Strongest Subaru Engine?

The strongest Subaru engine currently available is the 2.5L turbocharged Boxer 4-cylinder, found in the WRX STI and other performance variants of the Impreza, Forester, and Legacy models. This engine produces a maximum output of 310 horsepower at 6,000 rpm and 290 lb-ft of torque at 4,000 rpm.

It utilizes both direct fuel injection and an intercooled twin-scroll turbocharger for improved power delivery and efficiency compared to previous engines.

The 2.5L Boxer also features forged connecting rods, sodium-filled valves, additional cooling capacity with a larger radiator fan assembly as well as upgraded pistons for increased strength under hard acceleration or load-carrying duties.

Are All Subaru Engines the Same?

No, not all Subaru engines are the same. Depending on the model and year of the vehicle, there can be a variety of different engine options available.

Popular models such as Forester, Outback and Legacy come with either four-cylinder or six-cylinder boxer engines, while other models may feature turbocharged versions for added performance.

Additionally, some older Subaru models used conventional inline four-cylinder engines instead of the company’s signature boxer design.

As technology advances, so does Subaru’s lineup of engine offerings; newer vehicles incorporate advanced technologies such as direct injection or partial hybrid systems to further improve efficiency and power output over previous generations.

Subaru Engine Swap Must Have Parts


In conclusion, the Subaru engine swap compatibility chart is an invaluable resource for anyone considering a Subaru engine swap. It provides the necessary information needed to determine which engines are compatible with each model and year of car, allowing you to make an informed decision on what type of engine will best suit your needs.

With this knowledge in hand, you can be sure that your next Subaru engine swap will go smoothly and provide years of reliable performance.

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