Before Jay Leno, this 1970 Dodge Charger was a SEMA star

Tantrum unleashes 1,650 horsepower of insanity.

When Jay Leno drives an awesome car, enthusiasts take note, and this week the internet blew up over the 1970 Dodge Charger resto-mod that starred in a recent Garage episode. But you might not remember: this strapping Charger, called "Tantrum," was one of the highlights of the SEMA Show in Las Vegas last fall. Here's another look at a true Mopar monster.

The power: Yep, Tantrum has 1,650 horsepower. That's more than two Hellcats worth of power under the hood. It's a twin-turbo 9.0-liter Mercury Racing engine with a quad-cam four-valve setup. Basically, it's a V8 boat motor developed for cars. Mercury Marine is the crew that developed the V8 for the 1990s Chevy Corvette ZR-1. That all-aluminum LT-5 under the hood cranked out 405 hp – an astronomical figure for the time – and helped make the ZR-1 an icon.

Take a listen to Tantrum's 9.0-liter Mercury mill below.

Who's behind all of this? SpeedKore, a Wisconsin-based performance shop that does one-off pro touring builds. It specializes in remaking Detroit muscle with modern features like carbon fiber, bespoke interiors, and powerful engines. SpeedKore is pretty good at it. Before it threw a Tantrum, it did the "Cudinator" used in some of the Fast and the Furious movies.

You might not know: Tantrum won the Best Domestic category of the GT Awards at SEMA – chosen by your author. The sinister looks were the hook, and the crazy engine solidified its performance cred.

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