Unlock the full performance potential of your Subaru WRX STI with this upgraded VF48 turbocharger from PTTURBO.COM — engineered for quicker spool, stronger boost response, and reliable long-term performance.

This turbo is a direct bolt-on replacement for the factory VF48, but comes packed with premium upgrades that make a difference where it counts. At the core of this upgrade is a CNC-machined billet compressor wheel made from aerospace-grade 7075-T6 aluminum — known for its extreme strength-to-weight ratio and high resistance to fatigue. The result is a turbo that spools faster, responds sharper, and holds power more efficiently across the RPM range.

Key Upgrades & Features:

• Billet 7075-T6 Aluminum Compressor Wheel: Lighter and stronger than cast — allows for faster spool, better throttle response, and greater efficiency at higher boost levels
• Direct Replacement for VF48 Turbo: OEM fitment with enhanced internals — no modifications needed
• Assembled in the USA: Each unit is balanced in-house on a high-speed VSR machine at speeds up to 100,000 RPM for superior durability and reliability
• Includes new wastegate actuator and full gasket kit for hassle-free installation
• High-Quality Construction: Cast iron turbine housing and aluminum compressor housing for heat tolerance and strength
• Warranty: 1-Year Manufacturer Warranty included

OE/OEM Part Number Compatibility:

• VF48 / 14411-AA700
• 14411AA700 / F56CAD-S0057B
• Interchange Part Number: 14411-AA700

Vehicle Fitment:

• 2008–2015 Subaru Impreza WRX STI (All Trims)

Why Upgrade to This Turbo?

• Faster spool for improved low-end torque and acceleration
• More top-end power without increasing turbo size — retains stock fitment
• Balanced and tested to OEM+ standards for long-term reliability
• Easy install with all hardware included — perfect for enthusiasts and pros alike

Install Note:
This is a direct replacement turbo and is designed for plug-and-play installation. However, we strongly recommend having it installed by a qualified professional to ensure optimal performance and longevity. Always prime the turbo with oil before first startup.

Experience a noticeable upgrade in performance, responsiveness, and build quality — all while retaining factory compatibility.

California buyers: Sales tax applies
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Why Choose a Billet Turbo for Your Subaru WRX STI?

The VF48 and VF39 are the factory IHI turbochargers used on the Subaru Impreza WRX STI — two of the most popular performance turbos in the Subaru community. The VF48 came standard on the 2008–2014 STI, while the VF39 was used on earlier STI models. Both use cast aluminum compressor wheels that are adequate for stock power levels but become a limiting factor in modified applications. A billet compressor wheel — machined from aerospace-grade aluminum billet rather than cast — offers tighter blade tolerances, stronger material properties, and improved aerodynamic efficiency that results in more airflow at the same boost pressure.

This billet turbo for the Subaru Impreza WRX STI replaces the OEM cast compressor wheel with a billet wheel while maintaining full compatibility with the factory turbo plumbing, actuator, and wastegate.

Benefits of the Billet Wheel Upgrade

• Improved compressor efficiency — more airflow per pound of boost
• Better high-RPM airflow for top-end power gains
• Stronger than cast — resists surge and compressor wheel failure at elevated boost
• Drop-in fitment — no turbo inlet or outlet modifications needed
• Compatible with stock and aftermarket intercoolers and intake systems

PT Turbo — Subaru Turbo Specialists

PT Turbo in San Bernardino, California has been building and rebuilding Subaru EJ-platform turbochargers for performance enthusiasts and daily drivers alike since the platform arrived in the US market. We can answer fitment questions for specific STI build years and advise on actuator spring rates if you are running elevated boost targets. Contact us before ordering if you have a modified application.

Protecting your new billet turbo starts before installation. See our guide to making your turbocharger last for the pre-oil procedure and break-in steps.