Nissan’s little SR20 four-cylinder engine is a legend in the import world, but Florida’s Mazworx Manufacturing keeps finding ways to crank insane power out of it. That Racing Channel recently dropped in to check out how Mazworx builds world-record-setting SR20s, including a wild triple-turbo setup targeting power levels that seem almost impossible for just 2.2 liters. Mark Mazurowski from Mazworx shared his journey, which started back in 2004.

“We quickly became known for building some of the most powerful SR20s in the world,” says Mazurowski. Mazworx’s reputation is backed by results. We brought you this article when they eclipsed the 2,000-horsepower mark with an SR20, and Mazworx holds the SR20 drag record – a blistering 6.22 at 229 mph, achieved with their single-turbo S15 Silvia that reliably belted out 2,000 horsepower. Getting there wasn’t easy.

Mazurowski recalled early struggles, noting they had a lot of rocker issues, common to high-revving SR20DET engines. Switching to the SR20VE Variable Valve Lift head proved crucial for reliability. From there, Mazworx developed billet blocks and eventually aimed even higher with a radical triple-turbo compound system in a Celica chassis. This complex setup — “a Shane T invention,” according to Mazurowski — uses two smaller turbos to force-feed a larger high-pressure turbo, with intercooling between stages. Mark reported this setup made about 2,300 horsepower before finding its limit. “At 130 pounds of boost, the stock cast cylinder head just wouldn’t take it,” he explains.

To push past that limit, Mazworx teamed up with MT Performance in Australia for tougher roller rockers, which they are currently testing on a dedicated dyno engine using their Pro Drag billet block. Mazurowski states that if the rockers prove reliable at their target of 12,000 peak RPM, the next step would be making a billet head. The wild goal? Create an SR20 package that can reliably handle 200 pounds of boost and reach a mind-boggling theoretical 3,000 horsepower by spinning the engine incredibly fast to manage the torque. “We have so many years of development in this motor; why stop now?” Mazurowski reasons. Even with the stock head holding it back for now, that triple-turbo Celica already cranked out over 2,300 horsepower, making it the undisputed king of SR20 power today. It’s crazy proof of Mazworx’s obsession with squeezing every last drop of potential from Nissan’s mighty four-cylinder engine platform.