Subaru STI Engine Parts | WRX STI Engine Upgrades

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IAG Performance Stage X Short Block 2002-2014 WRX / 2004-2021 STI

$17,999.99

$17,999.99 - $17,999.99

$17,999.99

$17,999.99 - $17,999.99

The CNC Billet Aluminum EJ case seeks to change the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness ...

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Remark Front Strut Tower Bar 2015-2021 WRX / 2015-2021 STI

$265.00

$265.00 - $265.00

$265.00

$265.00 - $265.00

Weight - 2.0lbs Material - Full T304 Stainless Steel Manufacture - Tig-welded and fabricated by hand Style - Brushed finished

OLM LE Dry Carbon Fiber Belt Cover 2015-2021 STI

$199.00

$199.00 - $199.00

$199.00

$199.00 - $199.00

DESCRIPTION The OLM LE Dry Carbon Fiber Belt Cover, imported from Japan, exemplifies this commitment to quality craftsmanship. Axis Parts meti...

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Blouch Dominator 5.0XT-R Ball Bearing Turbocharger 2002-2007 WRX / 2004-2021 STI

$2,480.50 - $2,580.50

$2,480.50

$2,480.50 - $2,580.50

Disclaimer: Photos are for illustrative purposes only, the actual product may differ slightly. DESCRIPTION The Blouch Dominator 5.0XT-R Full Ball B...

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Perrin Hyper Pink Cold Air Intake 2018-2021 STI

$304.30

$304.30 - $304.30

$304.30

$358.00

$358.00 - $358.00

$358.00

Increase horsepower and add under-hood style with the PERRIN Cold Air Intake. It features correct MAF alignment and tubing size to maintain proper ...

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Tomei ARMS MX7760 Turbo 2002-2007 WRX / 2004-2021 STI

$1,422.00

$1,422.00 - $1,422.00

$1,422.00

$1,580.00

$1,580.00 - $1,580.00

$1,580.00

On this page, you are looking at the Tomei ARMS MX7760 Single Scroll Turbocharger. This is Tomei's latest design that features a new CNC billet com...

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Tomei ARMS MX7960 Turbo 2002-2007 WRX / 2004-2021 STI

$1,422.00

$1,422.00 - $1,422.00

$1,422.00

$1,580.00

$1,580.00 - $1,580.00

$1,580.00

On this page, you are looking at the Tomei ARMS MX7960 Turbocharger. This is Tomei's latest design that features a new CNC billet compressor wheel....

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Tomei ARMS BX7760 Turbo 2002-2007 WRX / 2004-2021 STI

$1,602.00

$1,602.00 - $1,602.00

$1,602.00

$1,780.00

$1,780.00 - $1,780.00

$1,780.00

This is the new Tomei BX-Series Ball-Bearing Turbocharger. The BX-Series is Tomei's latest ball-bearing turbocharger example that features the late...

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Tomei ARMS MX8265 Turbo 2002-2007 WRX / 2004-2021 STI

$1,422.00

$1,422.00 - $1,422.00

$1,422.00

$1,580.00

$1,580.00 - $1,580.00

$1,580.00

On this page, you are looking at the Tomei ARMS MX8265 Single Scroll Turbocharger. This is Tomei's latest design that features a new CNC billet com...

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AEM Cold Air Intake Wrinkle Red 2018 STI

$349.99

$349.99 - $349.99

$349.99

$349.99 - $349.99

The AEM 21-836WR Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle’s restrictive factory air filter...

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Forced Performance XR Red 79HTZ Turbocharger 2002-2007 WRX / 2004-2021 STI

$2,899.00 - $2,999.00

$2,899.00

$2,899.00 - $2,999.00

XR Red Compressor wheel - 79HTZ Flow rating - 65LB per minute CW Measurements - 57MM Inducer / 79MM Exducer TW Measurements - 67.7MM Inducer / 6...

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Forced Performance XR Blue 73HTZ Turbocharger 2002-2007 WRX / 2004-2021 STI

$2,699.00 - $2,999.00

$2,699.00

$2,699.00 - $2,999.00

XR Blue™ Compressor wheel - 73HTZ™ Flow rating - 57LB per minute CW Measurements - 52.6MM Inducer / 73MM Exducer TW Measurements - 60.8MM Induc...

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Forced Performance XR Black 82HTZ Turbocharger 2002-2007 WRX / 2004-2021 STI

$2,899.00 - $2,999.00

$2,899.00

$2,899.00 - $2,999.00

New for 2020! All FP Black model turbos will come standard with a black coated compressor cover! Compressor wheel - 82HTZ Flow rating - 71LB per...

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ETS T4 Twin Scroll Turbo Kit 2015-2021 STI

$5,345.00 - $8,612.00

$5,345.00

$5,345.00 - $8,612.00

The Extreme Turbo Systems 2015-2021 Subaru STI Twin Scroll Turbo Kit is designed to give you the broadest powerband without sacrificing performance...

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ETS Titanium Air Intake Kit 2015-2021 STI

$495.00

$495.00 - $495.00

$495.00

$495.00 - $495.00

The ETS Cold Air Intake locates the filter in the fender well out of the engine bay. This makes for not only the coldest air possible but the most ...

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Your Subaru STI was built for excitement, but why settle for stock when you can achieve so much more? WRXDaily’s premium Subaru STI engine parts help you unlock the raw potential of your car. Turn your track days or daily drives into unbeatable experiences.

Whether you’re aiming for peak efficiency or high-octane power, our Subaru WRX STI engine upgrades deliver solutions tailored to your goals. For even greater customization, explore our range of Subaru STI aftermarket performance parts crafted to elevate every aspect of your engine’s performance.

Every part we offer is precision-engineered for seamless integration and maximum impact. From reliable endurance to thrilling power gains, these parts are made to perform. Don’t wait to transform your Subaru into the ultimate performance machine; start your build with WRXDaily’s expertly crafted parts today.