642 Horsepower STI Wows The Domestic Crowd

There’s nothing like good old-fashioned teasing to motivate the competitive spirit in anyone. When it’s a group of old friends with egos and horsepower, the situation becomes even more interesting. For Scott Franischetti, a veteran of the muscle car and domestic scene, there was something about Subaru’s Impreza STI that […]

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Subaru STi 630+ Horsepower Street Car

Life comes packed with learning experiences, and some of them cost more than others. When it comes to project cars, you’ve got to pay to play. Though these lessons are often costly, the knowledge gained helps pave the way to bigger and better builds. Text and Photos by Richard Fong […]

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Subaru STi 9-Second Home-brewed Dragger

These days, few can claim to have truly built an entire vehicle by themselves. Since the tuning knowledge base and information online (both good and bad) have grown exponentially, automotive enthusiasts theoretically have more data about how to modify vehicles than ever before. But too often, use of incorrect information, […]

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2011 Subaru Impreza STI GVB Part 3

In our last STI GVB Test & Tune, we increased the EJ257’s operating efficiency with a bolt-on intake system, a high-flow downpipe, and an exhaust system. These bolt-ons netted a peak horsepower gain of just over 31 horsepower but revealed the limitations of the factory intercooler system as the power […]

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2011 Subaru Impreza STI GVB Part 2

The last time we checked in on our Subaru STI sedan Test & Tune project, we extracted an additional 34.5 WHP by simply changing engine oil, installing new spark plugs, fine-tuning the engine calibration and increasing peak boost pressure by only 1.5psi. This time around, we enlisted the services of […]

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2011 Subaru Impreza STI GVB Part 1

Subaru’s third-generation STI platform was released in the model year 2008 but was initially available only in the 5-door wagon configuration. This lack of choices had many Subaru enthusiasts holding off on purchases until the release of the GVB-coded sedan in 2011. With a few minor facelift and aero enhancements, […]

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Supercharged Turbocharged Subaru WRX STi

While the ignorant V8 “Mountain-Motor” camp still spouts the “There’s no replacement for displacement” mantra, various methods of forced-induction have proven to be the perfect substitutes for cubic inches. Turbochargers, along with positive displacement and centrifugal superchargers, have allowed small-displacement engines to multiply their naturally-aspirated output. When the desired power […]

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2004 Subaru STi GDB Part 3

For the second month in a row, our STi earned a bye-run in competing against our EVO-VIII. The EVO-VIII has been involved with one of our most-extensive exhaust tests that will appear in our sister publication Tuner Performance Reports (TPR). Text by Michael Ferrara // Photos by Phil Lam DSPORT […]

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2004 Subaru STi GDB Part 2

For our ongoing battle betweeen STi and EVO-VIII, we were planning on having another round of upgrades for both vehicles. However, things don’t always go as planned in the world of magazines. For this issue, our STi earned a bye-run when our EVO-VIII had to be racked for a clutch […]

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2004 Subaru STi GDB Part 1

What’s better… Subaru STi or EVO VIII? Both are great cars with tremendous potential for additional power and performance. Over the next year or two, we hope to provide some additional insight to this question by showing the performance potential of each vehicle. Text by Michael Ferrara // Photos by […]

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