It also brings back a performance gizmo that hasn’t been featured in a U.S. market Subaru since 2007: the intercooler sprayer.

This Buyer's Guide showcases some of the very best products from the most respected manufacturers for your 2002-2008 Subaru WRX/STi. Check it all out in Turbo & High-Tech Performance.

The Viziv Performance concept signals Subaru's design intention for the next WRX sport compact. Read more and see photos at Car and Driver.

This is functional fabrication at its finest.Builds Subaru WRX Hatch With Custom Rear-Mounted Cooling System Will Crush High Temps and Track Days ...

Check out this 460 whp 2006 Subaru Impreza WRX STi that is powered by Cobb Tuning. Read all about this in Turbo & High-Tech Performance.

The air is channeled to a larger turbocharger. The performance exhaust system is a bespoke STI design with less airflow resistance. The S209 also has an intercooler water-spray system.

The EJ25's cooling is handled by a Vibrant front-mount intercooler and custom piping, and fueling involves multiple pumps, 2000cc injectors, and PTFE lines and fittings allowing for E85 to be ...

So we called up Subaru and borrowed a 2009 WRX five-door the company had fitted with several SPT (Subaru Performance Tuning) add-ons.

The Forester is up for auction through Bring a Trailer and while the exterior is relatively unassuming, it has been outfitted with the same 2.5-liter turbocharged EJ257 four-cylinder engine used ...

Prodrive also says the six-speed sequential gearbox can shift its helical-cut gears in 80 milliseconds, and a specialty motorsport turbo amps up the power with a high-performance intercooler and ...

Subaru Impreza Spec C Ultimate version of performance legend is unleashed – and we deliver our verdict.