Can a Subaru be supercharged?
Yes. Subarus can be supercharged using aftermarket kits on select engines; there is no factory Subaru supercharger option.
Beyond that, this article explains how supercharging works on typical Subaru engines, what years and models have kit support, and the practical considerations for reliability, warranty, and emissions.
How supercharging works on a Subaru
Subaru engines can be boosted with a belt-driven supercharger that forces more air into the engine, increasing horsepower and torque. Because many Subarus use horizontally opposed (boxer) engines, adding a blower requires precise tuning, robust cooling, and carefully chosen supporting upgrades to avoid detonation and reliability issues.
Before diving into a project, readers should understand the core mechanics and the hurdles involved when converting a normally aspirated engine to forced induction.
- Engine compatibility and compression ratio
- Fuel system upgrades (injectors, fuel pump, rails)
- ECU tuning and ignition timing control
- Intercooling or charge cooling requirements
- Cooling system capacity and heat management
- Drivetrain strength, including the transmission and differential
- Emissions compliance, warranty implications, and local regulations
Key engineering and compatibility considerations before selecting a kit:
With thorough planning and professional installation, a supercharged Subaru can be a robust setup, but it is not a simple add-on for every model.
What models and engines have aftermarket supercharger options
Aftermarket support for Subaru superchargers varies by engine family, generation, and market. Kits exist for several legacy EJ-series engines and, to a lesser extent, some FA/FB platforms, but availability is not uniform across all years or regions. Always verify compatibility with the kit manufacturer and a qualified tuner before purchase.
- Older EJ-series engines (used in Impreza, WRX, and Forester from various generations) with established blower options
- Some FA/FB engines in select generations have experimental or limited-kit support, depending on the model year and market
- Factory-turbo models (WRX/STI) are not typically offered with a factory supercharger, and converting from turbo to supercharger is complex and not widely recommended
Commonly referenced engine platforms in the Subaru aftermarket community include the following, with caveats about year and model:
Kit availability and proven reliability depend on the specific engine code, vehicle year, and the installer’s expertise.
Pros, cons and practical considerations
Weighing the benefits and drawbacks helps determine whether a supercharged Subaru is right for a given use case and budget.
- Pros: noticeable power and torque gains, potential for smoother power delivery, and the possibility of targeting specific performance goals with a controlled boost
- Cons: increased cost, added mechanical complexity, higher risk of engine wear or failure if not tuned correctly, potential warranty void, and emissions/regulatory considerations
- Practical path: invest in a reputable kit, ensure supporting upgrades (fuel, cooling, and ECU), and work with a qualified tuner to maximize reliability and performance
For most enthusiasts, the decision hinges on budget, intended use (street vs. track), and willingness to manage the ongoing maintenance and regulatory considerations.
Summary
In short, a Subaru can be supercharged through aftermarket solutions on certain engines, but it is not offered as a factory option by Subaru. The feasibility and success of a supercharged build depend on engine compatibility, careful tuning, and comprehensive supporting upgrades. For many performance goals, factory turbocharged models or selective turbo builds remain more common and well-supported choices within the Subaru lineup.
