Blouch Performance Turbo Dominator 4.0XT-R Ball Bearing Turbocharger w/ 3" Inlet 2002-2007 WRX / 2004-2021 STI | 600HP Support | High-Flow Ball Bearing Turbocharger
Overview
The Blouch Performance Turbo Dominator 4.0XT-R is a high-capacity, bolt-on turbocharger upgrade designed specifically for Subaru WRX and WRX STI models from 2002 to 2007 and 2004 to 2021 respectively. Engineered to support up to 600 crank horsepower, this turbocharger delivers significant power gains while maintaining efficient spool characteristics thanks to its advanced ball bearing design and optimized compressor and turbine components. It is ideal for enthusiasts seeking a reliable, high-performance turbo solution that fits within the stock location.
Blouch’s engineering approach centers on precision and innovation, featuring a fully machined billet "XT-R" compressor wheel with a 3" inlet bellmouth housing that maximizes airflow and efficiency. The turbo incorporates a low friction, low inertia ceramic ball bearing system paired with a custom high-flow turbine wheel and a 10cm2 turbine housing. This combination reduces turbine inlet pressure and engine pumping losses, resulting in improved torque and horsepower delivery at lower boost levels. The Dominator 4.0XT-R exemplifies Blouch’s racing heritage and commitment to cutting-edge turbo technology.
For Subaru owners, this turbocharger offers a seamless upgrade path that enhances power potential without compromising drivability or requiring extensive modifications. The bolt-on fitment preserves factory mounting points, making installation straightforward for those with supporting modifications like a 3" inlet and external wastegate. This turbo’s design ensures strong mid-range torque and high-end power, making it a versatile choice for street and track applications alike.
Features & Specifications
This Blouch Performance Turbo Dominator 4.0XT-R is engineered for 2002-2007 WRX and 2004-2021 STI platforms and features a 3" inlet billet compressor wheel. Constructed from high-grade billet aluminum and advanced ceramic materials, it delivers efficient airflow and durability for Subaru enthusiasts seeking high horsepower and reliable spool characteristics.
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Brand: Blouch Performance Turbo
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Product: Dominator 4.0XT-R Ball Bearing Turbocharger w/ 3" Inlet
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Part Number: N/A
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Fitment: 2002-2007 Subaru WRX / 2004-2021 Subaru WRX STI
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Material: Billet Aluminum Compressor Wheel, Ceramic Ball Bearings
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Finish: Natural Machined Aluminum
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Construction: Fully Machined Billet Compressor, Custom Turbine Wheel
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Origin: Made in USA
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Power Gains: Supports up to 600 HP Crank
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Tuning Required: Recommended
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Compressor Wheel Size: 60 lb/min XT-R Billet
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Turbine Housing: 10cm2 High Flow
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Inlet Size: 3" Bellmouth Compressor Inlet
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Turbo Type: Ceramic Ball Bearing
Key Benefits
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Performance: Supports up to 600 crank horsepower with improved torque at lower boost pressures
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Durability: Low friction ceramic ball bearing system enhances spool response and longevity
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Fitment: Direct bolt-on to stock location for 2002-2007 WRX and 2004-2021 STI with 3" inlet requirement
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Efficiency: 10cm2 turbine housing reduces pumping losses for better throttle response
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Quality: Fully machined billet compressor wheel and custom turbine wheel ensure consistent high flow and reliability
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Tuning: Designed for compatibility with external wastegate setups to maximize performance potential
What's Included
- 1× Blouch Performance Turbo Dominator 4.0XT-R Ball Bearing Turbocharger with 3" Inlet
- Installation instructions
Installation & Compatibility
Installation of the Dominator 4.0XT-R turbocharger is a moderate to advanced task recommended for experienced enthusiasts or professional shops. It requires a 3" inlet setup and strongly recommends the use of an external wastegate to achieve optimal performance and boost control. No major modifications to the stock turbo mounting points are necessary, preserving factory fitment. Proper tuning is essential to safely unlock the turbo’s full power potential and ensure engine reliability.
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Professional Installation: Recommended
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Modifications Required: 3" inlet piping and external wastegate setup
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Verify Compatibility: Confirm fitment for your specific year and trim level of WRX or WRX STI
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