The slammed Ford Explorer ST with 657 HP is an unlikely supercar killer

We don’t always offer crazy custom cars on When we do, it’s usually something absolutely bonkers like a giant V8-powered roller skate or a Ford Taurus with more power than a Bugatti Veyron. This Ford Explorer ST doesn’t look like a shoe and doesn’t have four-digit horsepower (yet). But in a world of modified Detroit muscle cars, this 10-second SUV is awesome.

For the record, a stock 2020 Ford Explorer ST isn’t boring. Its twin-turbocharged 3.0-liter V6 generates 400 horsepower (298 kilowatts) and, with the help of sticky summer tires, it can hit 60 mph in about five seconds. That’s not bad for a three-row SUV, but Kevin Krupski wanted a little more. When the COVID lockdowns hit in 2020, he got a little crazy and started looking for ways to modify his family trucker. Apparently no one told Kevin beforehand that once you start the path of modification, it will forever rule your destiny.

Photos courtesy of Kevin Krupski

It started out quite simply. Modern turbocharged vehicles generally respond well to engine settings and, as Muscular Ford explains, Kevin opted for a 100 horsepower upgrade. He loved it, and things went downhill from there. Unfortunately, the Ford Explorer doesn’t exactly have a tough aftermarket, so even something as simple as an exhaust upgrade needed a custom touch. He found friends at FenFabrication, creating an exhaust system that looked more like a work of art. Kevin was so pleased with the final product that he stuck with FenFabrication for a plethora of further upgrades. What, you thought he’d stop at one tune and run out? Pullese.

The mod list is more like a parts catalog for a Toyota Supra A80. Upgraded turbos, high-flow intake, upgraded wastegates, downpipes, intercooler, injectors and more all contribute to this 657-hp 3.0-liter V6 on all four wheels. Assuming a 20% transmission loss, this unlikely performance hero could produce around 820 hp (611 kW) at the crankshaft. And it’s done the hard way – by trial and error, because nobody makes high-performance parts for an Explorer.

657 WHP Ford Explorer ST Exhaust
Ford Explorer ST 657 WHP Engine

There’s enough power on tap to send this three-row SUV over the quarter-mile in 10.9 seconds. Once through the traps, upgraded eight-piston brakes bring it back. They are definitely needed, because this Explorer still has the weight of all three rows inside. And there could be even more power in the future, as Kevin said Muscular Ford upgraded turbos were good for 1,100 hp.

Will we see a Nine Second Explorer in the future? It’s hard to say, but one thing is certain. Kevin is absolutely down the editing rabbit hole, so we’ll be watching his Instagram page for more updates.

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