For Subaru STI enthusiasts aiming to boost performance, choosing the best turbo kit can be a game-changer. The top pick, the Turbocharger Turbo Kit with Gasket for Subaru Forester and WRX, stands out for its balance of power and reliability. The VF39 Turbo Turbocharger Replacement is a strong choice for those seeking a direct upgrade, while the Subaru Genuine Air Suction Kit offers a factory-fit solution for pure OEM quality. Buyers often face tradeoffs between cost, ease of installation, and long-term durability. Continue reading to see how these options compare and find the best fit for your Subaru STI build.
Complete the kit
Key Takeaways
- Top picks balance performance gains with installation complexity and reliability.
- OEM replacement options tend to offer better factory integration but may cost more.
- Cheaper kits often sacrifice durability or boost potential for initial savings.
- Premium turbo kits provide higher power but require more tuning and maintenance.
- The best choice depends heavily on user experience level and intended use.
| Turbocharger Turbo Kit with Gasket for Subaru Forester 2.0L and WRX 2.0L (2014-2020) |  | Best Overall for Durability and Compatibility | Compatible Vehicles: 2014-2018 Subaru Forester 2.0L, 2015-2020 Subaru WRX 2.0L | Part Number: 14411-AA881, 814306 | Material: Cast iron alloy, aluminum alloy, stainless steel | VIEW LATEST PRICE | See Our Full Breakdown |
| Turbocharger for Subaru Impreza WRX STI 2008-2015 Replaces IHI VF48 – BuyAutoParts 40-30187INVC Remanufactured |  | Best for Cost-Effective Replacement and Reliability | Brand: BUYAUTOPARTS | Model: 40-30187INVC | Application: 2008-2015 Subaru Impreza WRX STI | VIEW LATEST PRICE | See Our Full Breakdown |
| A-Premium Complete Turbocharger Kit with Wastegate Actuator & Gasket |  | Best for Multi-Model Compatibility and Easy Installation | Vehicle Compatibility: Impreza 2008-2014, Legacy 2005-2009, Outback 2005-2009, WRX 2013-2014 | Reference Number: VF52, 14411-AA800 | Material: Alloy | VIEW LATEST PRICE | See Our Full Breakdown |
| A-Premium Complete Turbocharger Kit with Wastegate Actuator & Gasket |  | Best for High-Grade Durability in Subaru Impreza | Vehicle Fitment: Subaru Impreza 2008-2014 | Turbo Model: VF48 | Material: Alloy | VIEW LATEST PRICE | See Our Full Breakdown |
| VF39 Turbo Turbocharger Replacement for Subaru Impreza WRX STI 2.5L (2004-2007) |  | Best for High-Response and High-Altitude Driving | OEM Part Number: 14411AA572 | Turbo Model: RHF55 VF39 | Application: 2004-2007 Subaru Impreza WRX STI 2.5L | VIEW LATEST PRICE | See Our Full Breakdown |
| BFO Turbo Turbocharger TD05-20G for Subaru Impreza WRX STI EJ20 EJ25 2002-2006 |  | Best Overall Performance and Durability | Vehicle Compatibility: Subaru Impreza WRX / STI 2002-2006 | Engine: 2.0L and 2.5L H4 GAS DOHC Turbocharged | Horsepower: Up to 380 HP | VIEW LATEST PRICE | See Our Full Breakdown |
| maXpeedingrods TD05 Billet Turbo Turbocharger for Subaru Impreza 2002-2006 |  | Best OEM Replacement with Upgraded Features | Engine Compatibility: 2.0L and 2.5L H4 Turbocharged | Vehicle Compatibility: Subaru Impreza WRX / STI (2002-2006) | Turbine Housing Material: Silicon-molybdenum | VIEW LATEST PRICE | See Our Full Breakdown |
| maXpeedingrods Turbocharger for Subaru Impreza WRX 2002-2006 |  | Best Balance of Power and Reliability | Vehicle Compatibility: Subaru Impreza WRX / STI 2002-2006 | Engine: 2.0L 1994cc, 2.5L 2458cc H4 GAS | Horse Power: Up to 380 hp | VIEW LATEST PRICE | See Our Full Breakdown |
| Subaru Genuine Air Suction Complete Kit for Impreza WRX STI Forester Turbo |  | Best OEM Replacement for Secondary Air System | Brand: Subaru | Model Numbers: 14864AA020, 14864AA030 | Unit Count: 1 | VIEW LATEST PRICE | See Our Full Breakdown |
More Details on Our Top Picks
Turbocharger Turbo Kit with Gasket for Subaru Forester 2.0L and WRX 2.0L (2014-2020)
This turbo kit stands out for its robust construction using heat-resistant cast iron, aluminum, and stainless steel, making it a reliable choice for Subaru owners seeking longevity. Compared with the VF48-based kits, it offers a broader compatibility across models like Forester and WRX, with a focus on durability rather than maximum performance gains. While installation requires proper tuning and professional help, its high-quality materials can handle daily driving and moderate upgrades effectively. It’s an excellent pick for those who prioritize long-term reliability over raw power, provided they are comfortable with installation complexity.
Pros:- High-quality heat-resistant materials ensure long-term durability
- Compatible with multiple Subaru models, increasing versatility
- Designed to improve overall engine reliability and performance
Cons:- Requires proper installation and tuning for optimal results
- May need professional inspection to verify fitment
Best for: Subaru owners looking for a durable, versatile turbo upgrade for daily driving or moderate performance improvements
Not ideal for: Enthusiasts seeking maximum horsepower gains or race-level setups, as this kit emphasizes durability over peak performance
- Compatible Vehicles:2014-2018 Subaru Forester 2.0L, 2015-2020 Subaru WRX 2.0L
- Part Number:14411-AA881, 814306
- Material:Cast iron alloy, aluminum alloy, stainless steel
Our verdict“This kit is ideal for Subaru owners who want a reliable, durable upgrade that fits multiple models and emphasizes longevity.”
Turbocharger for Subaru Impreza WRX STI 2008-2015 Replaces IHI VF48 – BuyAutoParts 40-30187INVC Remanufactured
This remanufactured turbo offers a practical solution for STI owners needing a reliable, factory-matched upgrade. It’s engineered for a straightforward replacement, similar to the OEM VF48, but with the added assurance of thorough testing and rebuilt bearings. Compared to brand-new options, it provides a more affordable route but may lack the slight performance edge of newer or upgraded turbos. Its main advantage lies in dependable, plug-and-play operation for those who want to restore factory performance without the premium price tag.
Pros:- Remanufactured with replaced bearings and seals for durability
- Engineered for easy installation with an exact fit
- Thoroughly tested to meet quality standards
Cons:- Limited to specific Subaru Impreza WRX STI models
- Lacks detailed customer feedback and performance data
Best for: STI owners seeking a cost-effective, reliable replacement turbo that restores stock performance
Not ideal for: High-performance enthusiasts aiming for maximum power gains, as this turbo is focused on OEM-like reliability rather than tuning potential
- Brand:BUYAUTOPARTS
- Model:40-30187INVC
- Application:2008-2015 Subaru Impreza WRX STI
Our verdict“This turbo is well-suited for STI owners needing a dependable, factory-replacement turbo without high-performance ambitions.”
This kit broadens the upgrade options for Subaru enthusiasts, fitting several models like Impreza, Legacy, and Outback from 2005 to 2014. Its inclusion of a wastegate actuator and gasket simplifies the installation process, especially for DIYers or garages working on multiple Subaru types. Compared to kits with a single model focus, this one sacrifices some specialization for versatility. The high-grade alloy construction helps with heat dissipation, but since it’s not universal, it’s less suitable for those with an exact model match or seeking maximum power gains.
Pros:- Compatible with multiple Subaru models and years
- Includes wastegate actuator and gasket for straightforward installation
- Constructed from high-grade alloy for heat dissipation
Cons:- Limited to specific vehicle models, not universal
- No customer ratings or pricing info available
Best for: Owners of various Subaru models seeking a versatile, heat-efficient turbo upgrade with included accessories
Not ideal for: Owners seeking a turbo kit specifically tuned for high-power modifications or stock replacements for specific models
- Vehicle Compatibility:Impreza 2008-2014, Legacy 2005-2009, Outback 2005-2009, WRX 2013-2014
- Reference Number:VF52, 14411-AA800
- Material:Alloy
Our verdict“This kit makes the most sense for Subaru owners who need a flexible, heat-resistant turbo upgrade with all necessary components included.”
A-Premium Complete Turbocharger Kit with Wastegate Actuator & Gasket
Designed for Impreza models from 2008 to 2014, this kit features the VF48 turbo, similar to the OEM, but with enhanced heat dissipation owing to its high-grade alloy. The inclusion of a wastegate actuator and gasket simplifies installation, making it accessible for those comfortable with technical tasks. Unlike some kits that include exhaust manifolds, this one excludes it, which means additional parts may be needed to complete the setup. Compared to the previous A-Premium kit, this one emphasizes durability for high-mileage applications, though installation complexity might be higher for some users.
Pros:- Compatible with multiple Subaru Impreza models
- Includes wastegate actuator and gasket for easier setup
- High-grade alloy construction improves heat management
Cons:- Excludes exhaust manifold, requiring additional parts
- Installation may require advanced mechanical skills
Best for: Impresa owners who want a durable, heat-efficient turbo upgrade with OEM-like performance and are comfortable with installation
Not ideal for: Casual users or those requiring a complete bolt-on solution with exhaust manifold included, as this kit excludes some components
- Vehicle Fitment:Subaru Impreza 2008-2014
- Turbo Model:VF48
- Material:Alloy
Our verdict“This kit is best suited for Impreza owners seeking a durable, heat-efficient turbo upgrade, willing to handle installation complexity.”
VF39 Turbo Turbocharger Replacement for Subaru Impreza WRX STI 2.5L (2004-2007)
This turbo replacement emphasizes quick response and smooth acceleration, making it an excellent choice for STI owners focused on street performance. It’s a direct replacement for the OE VF39, offering similar characteristics but optimized for high-altitude environments, where it can improve stability and fuel economy. Compared with larger turbos like the VF48, the VF39 provides more immediate throttle response, though it might offer less top-end power. Installation involves matching OE numbers, which could be a hurdle for some DIYers, but its improvements in response speed make it appealing for spirited driving.
Pros:- Enhances throttle response and acceleration
- Improves fuel economy and driving stability at high altitudes
- A direct OE replacement for seamless fit
Cons:- Compatibility depends on matching OE part numbers
- Installation may require technical knowledge
Best for: STI owners who prioritize quick throttle response and high-altitude performance without extensive tuning
Not ideal for: Those seeking maximum horsepower or planning major internal engine modifications, as this turbo is focused on efficiency and response
- OEM Part Number:14411AA572
- Turbo Model:RHF55 VF39
- Application:2004-2007 Subaru Impreza WRX STI 2.5L
Our verdict“This turbo replacement makes sense for STI owners seeking sharper response and high-altitude efficiency over raw power gains.”
BFO Turbo Turbocharger TD05-20G for Subaru Impreza WRX STI EJ20 EJ25 2002-2006
This turbo stands out for its robust construction, featuring a ductile iron turbine housing and a forged aluminum compressor wheel that support high boost levels and reliable operation over time. Compared with the maXpeedingrods options, it offers higher durability with high-temperature resistant components, making it ideal for serious tuning. However, its installation requires technical skill, and its compatibility is limited to specific Subaru models from 2002 to 2006. The high-quality materials and support for up to 380 horsepower make it a top choice for those seeking a long-lasting, high-performance upgrade, especially for turbocharged engines demanding more power.
Pros:- High durability with high-temperature resistant components
- Supports up to 380 horsepower for serious tuning
- Made with quality, reliable materials
Cons:- Installation may require technical expertise
- Compatibility limited to specific Subaru models
- Potentially higher maintenance due to complex components
Best for: Performance enthusiasts planning extensive tuning and upgrades on 2002-2006 Subaru Impreza WRX/STI models.
Not ideal for: Casual users or those seeking a straightforward replacement without modification, due to complex installation and high tuning requirements.
- Vehicle Compatibility:Subaru Impreza WRX / STI 2002-2006
- Engine:2.0L and 2.5L H4 GAS DOHC Turbocharged
- Horsepower:Up to 380 HP
- Turbine Housing Material:Ductile iron
- Compressor Wheel Material:Forged aluminum alloy
- Cooling:Water + Oil cooled
- Thrust Bearing:270 degree
- Exhaust Outlet Flange:5-Bolt
- Inlet Flange:3-Bolts
Our verdict“This turbo is best suited for experienced tuners aiming for high horsepower with long-term reliability on 2002-2006 Subaru models.”
maXpeedingrods TD05 Billet Turbo Turbocharger for Subaru Impreza 2002-2006
This turbo makes sense for those looking to restore factory efficiency while gaining better airflow and boost response, thanks to its upgraded billet compressor wheel and high-temperature turbine housing. Compared with the BFO TD05-20G, it offers a more straightforward, OEM-style installation that minimizes modifications, making it ideal for users who want a reliable upgrade without extensive tuning. The limited customer reviews suggest less proven long-term performance, and its weight and price could be less appealing for budget-conscious buyers. Still, for drivers seeking a factory-like experience with slight performance improvements, this turbo is a solid choice.
Pros:- Easy OEM-style installation requiring no modifications
- High-temperature resistant turbine housing
- Upgraded billet compressor wheel for better airflow
Cons:- Limited customer reviews and long-term data
- Potentially high shipping weight
- Price and availability may vary
Best for: Owners of 2002-2006 Subaru Impreza models who want a reliable, OEM-style turbo upgrade without complex installation.
Not ideal for: Tuning enthusiasts aiming for maximum horsepower gains or custom setups, as it prioritizes restoration over extreme performance.
- Engine Compatibility:2.0L and 2.5L H4 Turbocharged
- Vehicle Compatibility:Subaru Impreza WRX / STI (2002-2006)
- Turbine Housing Material:Silicon-molybdenum
- Maximum Temperature:1832°F
- Compressor Wheel:Forged billet aluminum
- Product Dimensions:10.63 x 9.06 x 11.42 inches
- Weight:16.4 pounds
- Manufacturer Part Number:EQ64ID
Our verdict“This turbo is ideal for those seeking a straightforward, factory-resembling upgrade that improves efficiency on 2002-2006 Subaru Impreza models.”
maXpeedingrods Turbocharger for Subaru Impreza WRX 2002-2006
This turbo offers a reliable upgrade with ductile iron turbine housing and alloy components, supporting up to 380 horsepower, making it comparable in performance to the BFO TD05-20G but at a more accessible price point. Compared to the BFO model, it emphasizes durability and airflow efficiency for daily-driven or moderately tuned setups. Its installation, like most high-performance turbos, can be complex, and maintenance might be higher due to high-temperature operation. Nonetheless, it provides an effective balance for drivers seeking power without sacrificing dependability.
Pros:- High durability with ductile iron turbine housing
- Enhanced boost response and airflow efficiency
- Supports up to 380 horsepower
Cons:- Installation may require technical expertise
- Potentially higher maintenance due to high-performance components
Best for: Subaru owners wanting a durable, high-power turbo capable of supporting moderate tuning and daily driving.
Not ideal for: Beginners or casual enthusiasts who prefer plug-and-play solutions, since installation can be technically demanding.
- Vehicle Compatibility:Subaru Impreza WRX / STI 2002-2006
- Engine:2.0L 1994cc, 2.5L 2458cc H4 GAS
- Horse Power:Up to 380 hp
- Turbine Housing Material:Ductile iron
- Turbine Wheel Material:Alloy
- Compressor Wheel Material:Forged aluminum alloy
- Cooling:Water + Oil cooled
- Thrust Bearing:270 degree
Our verdict“This turbo suits drivers seeking a reliable, high-capacity upgrade for 2002-2006 Subaru Impreza models with moderate tuning plans.”
Subaru Genuine Air Suction Complete Kit for Impreza WRX STI Forester Turbo
This genuine Subaru air suction kit is designed for OEM-perfect replacement of secondary air system components, making it ideal for owners restoring or maintaining original factory performance. Compared with turbocharger upgrades, this kit is more about reliable system maintenance, especially for models like the Impreza WRX STI and Forester XT from 2005 to 2015. It guarantees exact fit and durability, but it doesn’t contribute to power gains or performance improvements directly. For owners seeking to keep their stock systems in top condition, this kit provides peace of mind and authenticity.
Pros:- Genuine OEM Subaru parts ensure fit and reliability
- Includes all necessary components for secondary air system
- Sealed parts prevent leaks and ensure durability
Cons:- Limited to specific Subaru models and years
- No direct impact on turbo performance or power
Best for: Owners of Subaru Impreza STI or Forester XT requiring authentic OEM parts for maintenance or original system restoration.
Not ideal for: Performance-focused buyers looking for turbo upgrades or power enhancements, since this kit is purely for system replacement.
- Brand:Subaru
- Model Numbers:14864AA020, 14864AA030
- Unit Count:1
- Fits:2005-2008 Subaru Forester XT, 2007-2015 Subaru Impreza STI
- Manufacturer:Subaru
- UPC:752589520560
- Manufacturer Part Numbers:14864AA020, 14864AA030
Our verdict“This genuine Subaru kit is perfect for maintaining or restoring the secondary air system to OEM standards on select models.”
How We Picked
I evaluated these turbo kits based on several key factors: overall performance potential, build quality, compatibility with Subaru STI models, ease of installation, and long-term reliability. Cost was also considered to identify options that provide the best value for different budgets. I prioritized products that have proven track records, positive user feedback, and clear documentation. The ranking reflects the balance between performance enhancements and practical considerations like maintenance and compatibility, helping buyers find the best fit for their specific needs.Factors to Consider When Choosing Best Turbo Kits For Subaru STI
Choosing the right turbo kit for your Subaru STI involves understanding several important factors. While performance is often the main goal, considerations like ease of installation, durability, and compatibility can significantly influence your satisfaction and long-term results. It’s essential to weigh these factors against your budget and experience level to avoid common pitfalls such as over-investing in a kit that surpasses your tuning skills or buying a setup that isn’t reliable over time.Performance Goals and Power Gains
Determine what kind of power increase you want—whether it’s a modest boost for daily driving or a significant jump for racing. Some kits are designed for quick, reliable upgrades, while others maximize horsepower at the expense of longevity. Clarifying your goals helps narrow down choices and avoid overpaying for features you don’t need.
Compatibility and Fitment
Ensure the turbo kit matches your Subaru STI model year and engine type. Many kits are designed for specific years or engine variants; using an incompatible kit can lead to installation issues or engine damage. Always verify compatibility with your vehicle before purchase.
Ease of Installation and Tuning
Some turbo kits come with detailed instructions and require minimal modifications, making them suitable for DIY enthusiasts. Others may need professional installation and tuning, which adds to the overall cost and complexity. Be honest about your skills and consider professional help if needed to avoid installation errors.
Durability and Long-Term Reliability
Look for kits with high-quality components, such as forged turbines and robust gaskets. Cheaper options often use lower-grade parts that may degrade faster or lead to reliability issues. Investing in a well-built kit can save money and hassle over the long run.
Cost and Value
Balance your budget against the features and performance you desire. Premium kits offer higher power and durability but come at a higher price. Conversely, budget options might be tempting but could require frequent maintenance or replacements. Consider your long-term goals and budget constraints to find the best value.
Frequently Asked Questions
Will installing a turbo kit void my Subaru STI warranty?
Installing an aftermarket turbo kit can void parts of your warranty, especially if it leads to engine damage or other issues. Subaru’s warranty policies vary, but in many cases, modifications are considered void if they cause damage. However, if installed professionally and tuned correctly, some owners experience minimal impact on warranty coverage. It’s wise to check with your dealer and consider the risk before proceeding.
Do I need to upgrade my fuel system when installing a turbo kit?
Yes, upgrading your fuel system is often necessary when installing a turbo kit that significantly increases power. This includes higher-capacity fuel injectors and a stronger fuel pump to ensure adequate fuel delivery and prevent lean conditions. Failing to upgrade the fuel system can lead to performance issues and potential engine damage, especially at higher boost levels.
Is a more expensive turbo kit always better for my Subaru STI?
Not necessarily. While higher-end kits typically feature better components and more reliable performance, they also require more tuning and maintenance. For most users, a mid-range kit offers a good balance of performance, durability, and price. The best kit depends on your specific goals, budget, and willingness to perform tuning and maintenance.
Can I install a turbo kit myself, or should I hire a professional?
Installation complexity varies widely. Some kits are designed for DIY installation with detailed instructions, while others require advanced mechanical skills and professional tuning. If you lack experience or tools, hiring a professional ensures proper installation and optimal performance. Improper installation can lead to engine damage or reduced reliability, so it’s worth considering expert help if unsure.
How does a turbo kit affect my Subaru STI’s reliability and longevity?
A well-chosen and properly installed turbo kit can enhance your vehicle’s performance without significantly impacting reliability. However, increased stress on engine components may accelerate wear if the kit isn’t high-quality or if maintenance is neglected. Regular tuning, quality parts, and proper cooling are key to maintaining longevity while boosting power.
