Volvos have a long-standing reputation as safe, practical and somewhat boring cars, with the possible exception of the old Volvo Turbo wagons. Sure, the S60 T6 R-Design sedan does what it can to liven things up, but its turbocharged 3.0-liter in-line six only puts out 325 horsepower, to all four wheels, via a six-speed automatic transmission.

It may be quick for a Volvo, turning 0-60 mph in 5.5 seconds, but that’s not exactly BMW M3 or Audi S4 territory. Thanks to Volvo specialist Polestar, however, you may soon be able to take steps to ensure that neither the BMW nor the Audi kick sand in your S60’s face.

To be clear, though, you can’t build the S60 Polestar seen in this Jay Leno’s Garage video from parts ordered over the internet. The car seen here features a host of one-off modifications, including a wide body with custom doors and a carbon fiber front clip.

You probably can’t buy the Polestar-milled connecting rods or the conversion kit to install your own six-speed manual, either. Its 508-horsepower engine may retain 99-percent of its original parts, but the other 1-percent are pure unobtainium.

A quick scan of the Polestar catalog doesn’t show us the custom airbox, or the hydroelectric rear differential or even the unique wheels and suspension components used, but we suppose the brand is fairly new to the U.S. market. As Leno describes Polestar, they’re where AMG was 25 years ago.

Still, we see the appeal of a Polestar Volvo S60 that can sprint from 0-60 mph in just 3.9 seconds, on its way to a top speed of nearly 190 mph, while looking like a safe and practical family sedan in “Swedish Racing Green.”

Rumor has it that Polestar already built one example for customer in the U.S. willing to part with the $300,000 price of admission. Bring that price more in line with German rivals, and we can certainly see a market for such a Q-ship Volvo sedan in the United States.